ByteRay researchers have published a blog on a set of vulnerabilities they are calling TrustFall, and the findings land hard for any company that treats the Trusted Execution Environment as the part of a device you do not have to worry about.
OP-TEE is the walled-off Secure World that phones, TVs, cars, and industrial gear lean on to guard keys, DRM, and identity, and the whole point of paying for that hardware isolation is the promise that even a compromised operating system cannot reach inside.
TrustFall shows that promise was not as solid as buyers assumed. The researchers found several flaws that let the untrusted side reach into or knock over the Secure World, which is exactly the outcome the design exists to prevent. The bugs have since been fixed upstream, so patched builds are available, but the uncomfortable takeaway for vendors is that the vault they were told to trust had a way in, and "it runs in the TEE" is no longer an answer on its own.
N-able has confirmed attackers exploiting an N-central zero-day made it into customer networks, as the vendor pushes out a second mandatory hotfix just days after the first. The security shop published an update on Thursday detailing what happened after attackers exploited CVE-2026-18577, the critical N-central flaw that can hand an unauthenticated attacker administrative access to the remote monitoring and management platform. According to N-able, attackers exploited vulnerable N-central servers remotely, then used the platform's Take Control feature to connect to systems inside the environments being managed through them. Once there, they registered a new Cloudflare Tunnel service to keep their foothold even after being booted from the N-central server – behavior that Huntress had already observed in the wild. N-able has now confirmed that its own investigation found the same activity, and says a "limited number" of customers were affected. It hasn't said how many customers that means, how many downstream systems attackers reached, or what they did once they had established persistent access. N-Able didn’t answer these questions when asked by The Register, instead providing a statement saying it is “proactively expanding protections in response to ongoing monitoring of threat actors as they evolve their attack techniques.” The firm’s limited disclosure comes alongside Hotfix 2, version 2026.3.1.10, which N-able says customers running N-central on-premises must install immediately – including those that already installed the first emergency fix released on August 2. "This is not a duplicate of our previous communication," N-able warned. "Hotfix 2 is required, even if you already applied the earlier hotfix." The company says the new update supersedes Hotfix 1 and adds further hardening measures as it monitors threat actors and watches them "evolve their attack techniques." Exactly what prompted the second round of defenses isn't clear. N-able hasn't said whether attackers found a way around Hotfix 1, and its latest description says the exploited vulnerability affected N-central servers running versions prior to 2026.3.1.7, the first hotfix. Hosted N-central environments have already received the latest mitigations, according to the vendor. N-able first became aware of the attacks on July 31, after its Adlumin managed detection and response service picked up suspicious activity at a customer. Further digging uncovered a zero-day being actively exploited against an N-central server. CVE-2026-18577 was subsequently disclosed, and the first hotfix was released on August 2. CISA added the bug to its Known Exploited Vulnerabilities catalog and gave US federal agencies until August 6 to fix it – an unusually short three-day deadline reserved for vulnerabilities the agency considers an urgent risk. N-central is particularly attractive territory for attackers because managed service providers use the software to administer large numbers of customer systems from one place. Compromising the management platform can therefore provide a route into machines belonging to the MSP's customers rather than leaving attackers stuck on the original server. Huntress previously described successful exploitation as giving an attacker the same level of N-central access normally reserved for trusted network operations and engineering staff. Its investigation found attackers using that access to launch remote-control sessions against managed endpoints. N-able has now published 10 IP addresses it says were used in the attacks and released a service template that customers can use to hunt for known indicators of compromise on Windows endpoints. The company is warning customers not to take a clean scan as an all-clear, however, saying the tool only checks for indicators identified so far and that more may emerge as its investigation continues. For anyone running N-central on-premises, the immediate instruction is pretty straightforward: install Hotfix 2, even if Hotfix 1 is already in place. ®
Two MIT researchers will present a new speculative execution attack at DEF CON 34 that uses precisely timed interrupts to bypass defenses against Spectre v2. Daniël Trujillo and Mengjia Yan of MIT's Computer Science and Artificial Intelligence Laboratory (CSAIL) shared their paper [PDF] with The Register ahead of publication. Their attack targets mitigations designed to neutralize potentially hostile branch predictor states before sensitive code runs. Such neutralization is an important defense against Spectre-style attacks. Depending on the mitigation, the processor or operating system isolates, clears, or safely retrains relevant predictor state when entering privileged code or shortly before a protected branch executes. Different chipmakers deploy neutralization mitigations slightly differently. Intel's eIBRS sanitizes branch predictors upon context switch, while AMD's Safe RET, introduced after the Inception attack Trujillo co-authored in 2023, focuses on the point immediately before a protected branch is executed. Trujillo and Yan refer to these as entry neutralization and in-place neutralization respectively. Crucially, the two classes share the same underlying assumption that attackers cannot alter branch predictor states within what's known as a "post-neutralization window" – the period between state neutralization and the branch predictor being used. The defense here relies on the assumption that everything between the point of neutralization and the usage by a victim branch is safe. Trujillo and Yan's attack shows how attackers can re-poison the branch predictor during the post-neutralization window. The researchers call the new class of attack TONTOU, for Time-of-Neutralization to Time-of-Use. They demonstrated that an attacker can exploit the post-neutralization window to re-poison branch predictor state on recent AMD and Intel processors. To do this, they developed an attack primitive called "interrupt injection." An unprivileged program schedules high-frequency timer interrupts in the hope that one will land during the often tiny post-neutralization window. Being able to trigger interrupts during the post-neutralization window allows attackers to divert control flow so that an interrupt handler executes after the sanitization phase and before the victim branch is used. The interrupt handler can then re-poison predictor structures such as the return stack buffer (RSB) or branch history buffer (BHB), causing a protected branch to speculatively jump to a disclosure gadget that leaks kernel data through a side channel. Practical attacks The researchers said that their tests showed the TONTOU attacks worked on both Intel and AMD-based Linux systems. They tested TONTOU on Intel Cascade Lake Refresh and Arrow Lake processors and AMD Zen 2 and Zen 4 chips. The researchers built a complete end-to-end exploit only for Zen 2, largely because the Intel attack requires specific software conditions. Speculative side-channel attacks remain difficult to pull off, and you're more likely to fall victim to ransomware than Spectre in the real world. Another serious caveat is that each end-to-end attempt took about 18 minutes, and you can see a sped-up version via the video Trujillo posted to YouTube. Trujillo and Yan identified the exact point at which they needed to inject their interruptions to poison the RSB, and through a series of attacks broke Linux's kernel address space layout randomization (KASLR), which allowed them to locate specific secrets such as etc/shadow, which contains the root password hash. Across ten total runs, the researchers were able to break KASLR every time, although they were only able to successfully locate and leak the contents of etc/shadow in five of these. "It's definitely not a simple attack, but we show that it's practical with our end-to-end exploit on AMD Zen 2," Trujillo told The Register. "Our demonstration does not assume anything special from the system: we use a stock Linux kernel version, no inserted modules, and all default mitigations. Any time you'd execute unprivileged code with timer availability on a system while sharing the kernel with a victim, this attack would be an issue. "For example, multi-tenant container platforms would fall in this category, allowing ordinary user space programs to leak memory from the shared kernel." The researchers hope that their work will inspire further investigations into interrupt injections and TONTOU attacks, and to help develop more robust mitigations against Spectre-style exploits. They engaged Intel, Arm, and AMD after gathering their results, but only the latter committed to address the issue via kernel patches. Intel told the pair that it won't be working up any other mitigations since real-world exploits are subject to too many factors, such as the availability of disclosure gadgets, although it awarded a prize from its bug bounty program in the hundreds of dollars. Arm said TONTOU's interrupt injections fall under "passive leakage," which it does not "actively protect against." ®
A Scottish NHS trust is investigating a data breach concerning the medical records of a nine-year-old girl who died earlier this week and was named publicly for the first time on Wednesday after a man was charged with her death. The alleged breach occurred at Ninewells Hospital in Dundee, and reportedly involved staff members accessing the girl’s medical records without authorization or clinical need. A spokesperson for NHS Tayside, which oversees Ninewells Hospital, said: “NHS Tayside is currently investigating the circumstances of an alleged data breach which happened in a working clinical area where staff access patient information. “As a matter of governance, any data protection breach would be recorded and investigated by NHS Tayside and, where appropriate, reported to the Information Commissioner’s Office (ICO). It would not be appropriate for us to comment further on individual staffing matters." NHS Tayside did not respond to questions about the nature of the accessed data nor who is thought to be behind the intrusion. Medical records in the UK are protected by the UK GDPR, contained in the Data Protection Act 2018 as well as several common law confidentiality rules. NHS staff are only allowed to access patient information where there is a legitimate clinical or other work-related need. A 35-year-old man whom police say was known to the child, was arrested and appeared in court on August 5 over the death of Minnie Merriman. The man issued no plea at Forfar Sheriff Court on the day of his arrest and has been remanded in custody. Merriman was found in Elliot Industrial Estate at approximately 0002 on Monday, August 3, with serious injuries. The young girl was then taken to Ninewells Hospital in Dundee, where she later died. Police Scotland said that they are not currently looking for anyone else in connection with her death. Other members of Merriman’s family, who are from West Yorkshire and were camping nearby, are being supported by specialists. A family statement, released through Police Scotland, read: “We are devastated with the loss of our beloved, absolutely incredible, beautiful and brave Minnie Moo. Our family asks that our privacy is respected at this extremely difficult time." Detective Inspector Mike Ness of Police Scotland’s major investigation team said: "Our thoughts remain with everyone affected by these events, especially Minnie's family. "A police presence will remain in the area while our enquiries continue. "Anyone with any concerns, or information, should approach these officers or contact Police Scotland on 101, quoting incident number 0008 of Monday, 3 August 2026." ®
WordPress has fixed a pre-authentication reflected cross-site scripting (XSS) flaw in its login screen that affects every version of the content management system. pwn.ai demonstrated how the flaw can be chained into PHP code execution on the server when a logged-in administrator interacts with an attacker-controlled page.
Tracked as CVE-2026-64638 (CVSS score: 8.9), the high-severity
Passkeys are increasingly replacing passwords because they offer stronger protection against phishing and stolen credentials. But new research shows that malware already running on a device could potentially interfere with certain synced passkeys and hijack protected accounts.
That does not mean passkeys are broken or that people should stop using them. Instead, the research highlights an important distinction: strong account security still depends on the security of the device holding your credentials.
Here’s what researchers found, whether passkeys remain safe, and how to protect your accounts.
Can Malware Bypass Your Passkeys?
Researchers at Palo Alto Networks recently demonstrated several attack methods targeting Google-synced passkeys used through Chrome on Windows devices.
According to SecurityWeek, these techniques could allow malware already installed on a computer to impersonate a trusted device or obtain authentication information needed to access certain passkey-protected accounts.
Key takeaways
The device must already be infected. An attacker cannot steal your passkey simply by sending you a phishing text or email.
The research focused on synced passkeys. These credentials are encrypted and synchronized across compatible devices through a cloud account.
Malware may be able to impersonate a trusted device. Researchers demonstrated methods that could request valid authentication without producing the biometric or device-unlock prompt a user would normally expect.
More advanced techniques could potentially expose multiple synced passkeys. One method targeted sensitive information that briefly appears in browser memory during device enrollment.
Google was notified and has reportedly introduced mitigations. The findings came from controlled security research, not evidence of a widespread criminal campaign.
Yes. Passkeys remain more resistant to phishing than traditional passwords.
Passkeys are tied to the legitimate website or app they were created for, so a fake login page generally cannot trick you into typing or handing over the credential. They also eliminate the risks created by weak and reused passwords.
This research points to a different threat: malware already operating on your device may try to abuse the systems that store, synchronize, or approve your credentials.
Think of it this way: a stronger lock still matters, but it cannot fully protect you if an intruder is already inside the house.
This Week’s Safety Tips
✓ Use passkeys when available. They still provide stronger protection against phishing and password reuse than traditional passwords.
✓ Keep your browser, operating system, and security software updated. Updates help close vulnerabilities that malware could exploit.
✓ Be cautious with unexpected files and downloads. Fake updates, email attachments, and malicious links are common ways malware reaches a device.
✓ Review your trusted devices and active sessions. Remove devices you no longer recognize or use.
How McAfee Helps Protect Your Devices and Accounts
Device security helps detect and block viruses, malware, and other threats that could compromise the device where your passkeys and passwords are stored.
Web protection helps stop risky websites and malicious downloads before they can install harmful software or steal information.
Scam Detector identifies suspicious texts, emails, and links that may try to lure you into downloading malware or visiting a fraudulent website.
Identity Monitoring alerts you if personal information connected to your accounts appears in known data breaches or on the dark web, helping you respond before it can be used for fraud.
Other Scam and Security News This Week
Meta AI model reportedly accessed another company’s systems during testing. Meta confirmed that its Muse Spark model exploited a vulnerability after a testing configuration mistakenly gave it access to the internet. The company and its evaluation partner said the incident occurred under unusual testing conditions, and Meta is continuing to investigate. (CNN)
AI-powered voice phishing reportedly targets major financial firms. Hedge funds and private equity companies were reportedly targeted with “vishing” attacks that used AI-generated voices to impersonate real people and attempt to bypass security processes. At least one company said it detected the attempt before its systems were compromised. (Bloomberg/Gizmodo)
ChainDrop malware reportedly infects more than 1,300 software packages. Researchers say the self-spreading attack compromised packages distributed through the npm software registry and attempted to steal developer, cloud, and application credentials. Organizations that installed affected versions have been advised to rotate exposed credentials and inspect their systems for unauthorized activity. (BleepingComputer)
And we’ll be back next week with more scam alerts and cybersecurity news.
Open Source had a great childhood.
For two decades it got to be a kid. It ran around barefoot, gave everything away, trusted strangers, and never once thought about who was watching. It ran the kind of lemonade stand that took IOUs from anyone who wandered up — take what you need, pay me back whenever, no need to leave a name. It was idyllic. It was also, in retrospect, a little feral.
Then,
US defense and aerospace supplier IEH Corporation 'fessed up that a criminal managed to break into its Microsoft 365 mailbox in a filing with regulators. In a Form 8-K filed with the Securities and Exchange Commission on Thursday, IEH said one of its staffers fell for a phishing scam that gave an attacker access to its M365 environment. The attacker "impersonated a prospective business contact" and sent the employee what appeared to be a genuine Microsoft sharing link. The accompanying fake login page duly harvested the victim's M365 credentials. "The threat actor gained access to mailbox contents, including email messages, attachments, customer communications, purchase orders, engineering-related documentation, and potentially export-controlled technical information," IEH said in the SEC filing [PDF]. IEH said it had found "no evidence" that the information was copied or exfiltrated, although it was accessible to the intruder during the "compromise period." IEH said it discovered the intrusion on August 4 but did not disclose when the compromised account was first accessed or how long the intruder remained inside. "The account was secured, malicious mailbox rules were disabled, evidence was preserved, and corrective actions are underway," it said. "Following containment and investigation activities, the company initiated a review of account security controls and authentication protections applicable to Microsoft 365 services." The incident has not disrupted operations, and IEH does not expect it to have a material impact, although the investigation continues. The absence of detected exfiltration does not mean the intruder merely browsed the inbox and left. Compromised mailboxes can be used to monitor communications, impersonate employees, redirect payments, or prepare follow-on attacks, while data theft is not always visible in Microsoft 365 logs. There is not enough information to attribute the attack. IEH's work for defense and aerospace customers could make it an attractive espionage target, but ordinary cybercriminals also compromise mailboxes for fraud and data theft. Both Russia and China have been caught snooping around US orgs for defense-related information in the past year, although there is nothing to suggest either was behind the attack on IEH. Brooklyn-based IEH makes hyperboloid connectors designed for harsh and high-stress environments. Its components are used in printed circuit boards, medical devices, commercial aircraft, fighter jets, missiles, satellites, and other systems. Some of the high profile US programs that use IEH's hyperboloid connectors include the PATRIOT air-defense system, AMRAAM, THAAD, the APKWS precision-guided rocket, and the MARK-48 torpedo. ®
A use-after-free bug in Linux's SCTP networking code can be turned into full root on a host, and Tencent researchers say they used it to escape a container and reach the machine underneath.
The flaw has existed since 2008. The fix already shipped: stable kernels 7.1.6, 6.18.42, 6.12.101 and 6.6.148, released August 3, close it. Anyone running an older kernel with SCTP reachable should update.
Security researcher Malcolm Stagg has disclosed a new attack class called NatJack that manipulates network address translation (NAT) connection state to hijack active TCP sessions, spoof DNS responses, expose mapped ports, and exhaust NAT tables.
Presented at Black Hat USA 2026, the research found affected behavior across independently developed implementations, including Windows and
Cybersecurity researchers have called attention to an active "widespread email-driven phishing campaign" that employs adversary-in-the-middle (AitM) techniques to take control of Microsoft 365 accounts with an aim to identify key personnel involved in financial workflows and gather related email.
"The campaign uses residential proxies to disguise malicious sign-ins as ordinary consumer traffic,
PortSwigger says HTTP Terminator, an artificial intelligence (AI)-assisted research system built by James Kettle, generated and proved new HTTP desynchronization techniques after exploring 30,000 candidate desync vectors.
PortSwigger said a separate human-guided discovery cascade also exposed a zero-day in Apache Traffic Server. Kettle said HTTP Terminator tested 30,000 websites where
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