vulnerability disclosure5 articles
Roundup: Iranian Spooks Track US Troops Via Ad Data, macOS Malware Plays Dead, and a Textile Firm Goes Bust After Six Weeks of Ransomware Hell
This SecurityWeek roundup covers a broad range of cybersecurity developments, including a German manufacturer filing for bankruptcy after a six-week production shutdown caused by a cyberattack, and Iranian threat actors exploiting advertising and cellular roaming data to track US military personnel's smartphones. Other highlights include the discovery of CrashStealer, a new macOS information-stealing malware that disguises itself as a legitimate crash reporter, and a joint CISA guide providing organisations with a framework for establishing Coordinated Vulnerability Disclosure programs. Additional stories touch on supply chain breaches affecting Lidl customers, ransomware targeting an Asian IT firm, and a cybercrime group claiming to have stolen over 1TB of data from naval defence manufacturer Thyssenkrupp Marine Systems.
Seven Unpatched Flaws in a Tiny Filesystem Library Put Millions of Embedded Devices at Risk
Security researchers at runZero have disclosed seven vulnerabilities in FatFs, a widely used filesystem library embedded in millions of devices including security cameras, drones, industrial controllers, and crypto wallets. The most serious flaws can allow an attacker with physical access — such as inserting a malicious USB drive or SD card — to corrupt device memory and execute arbitrary code, with no upstream fixes available for six of the seven bugs due to an unresponsive maintainer. The situation is compounded by the fact that runZero used an AI-assisted fuzzing pipeline to discover the flaws, meaning the barrier to exploitation is low, while downstream vendors face a potentially years-long patching process with no coordinated disclosure channel in place.
Microsoft Threatened a Security Researcher With Criminal Charges. It Did Not Go Well.
An anonymous security researcher known as "Nightmare-Eclipse" published six zero-day exploits for unpatched Windows vulnerabilities after claiming Microsoft failed to address the reported bugs, prompting Microsoft's Security Response Center to condemn the actions and hint at potential criminal prosecution. This sparked widespread backlash from the cybersecurity community, with prominent researchers arguing that threatening legal action against security researchers discourages responsible disclosure and pushes researchers toward selling vulnerabilities to malicious actors instead. Microsoft subsequently walked back its position, clarifying it had no intention of pursuing action against researchers conducting legitimate security research.
Anthropic Quietly Fixed a Claude Code Sandbox Bypass Nobody Told You About
Anthropic quietly fixed two vulnerabilities in Claude Code's network sandbox that could have allowed attackers to bypass network restrictions and exfiltrate sensitive data. The second flaw, discovered by researcher Aonan Guan, involved a SOCKS5 null-byte injection trick that could fool the allowlist filter into permitting connections to unauthorized hosts. Guan has criticized Anthropic for lacking transparency, noting no CVE was assigned to his finding and no public disclosure or release notes warned users — though Anthropic states the fix was deployed before his bug bounty report was submitted.
AI Bug-Hunting Is Breaking Patch Records Across the Industry
Microsoft's May 2026 Patch Tuesday addressed 118 security vulnerabilities, including 16 critical flaws, but notably contained no zero-day exploits — a rare occurrence in nearly two years. The surge in patching activity across major tech companies, including Apple, Google, Mozilla, and Oracle, is largely attributed to "Project Glasswing," an AI vulnerability-detection tool developed by Anthropic that has proven highly effective at identifying security flaws in code. The tool has dramatically increased the volume and pace of security patches industry-wide, with Mozilla fixing 271 vulnerabilities in Firefox 150 and Google patching 127 Chrome flaws in a single update.