An integer overflow vulnerability exists in the Libarchive library included in Microsoft Windows. The vulnerability is due to insufficient bounds checks on the block length of a RARVM filter used for Intel E8 preprocessing, included in the compressed data of a RAR archive.
A remote attacker could exploit this vulnerability by enticing a target user into extracting a crafted RAR archive. Successful exploitation could result in arbitrary code execution in the context of the application using the vulnerable library.
Read more…
Source: Zero Day Initiative
Related:
- Defending against an active threat to Siemens S7 Series PLCs
August 19, 2026
This advisory relates to an active threat to Siemens S7 Series programmable logic controllers (PLCs). However, ongoing PLC targeting activity is broader than Siemens PLCs. All PLC owners and operators should apply relevant mitigations to reduce the risk to their devices and systems. The Siemens-specific content in this advisory should be understood and applied as ...
- CISA gives feds 3 days to fix actively exploited Ray RCE bug
August 18, 2026
CISA says attackers are exploiting a critical 2025 vulnerability in Ray, the widely used open source framework for scaling Python and machine-learning workloads. Tracked as CVE-2025-62593 and rated 9.4 under CVSS v4, the bug was first disclosed in November 2025. It allows an attacker to use Firefox or Safari to achieve remote code execution (RCE) on a vulnerable Ray system. The open ...
- Update your Mac: Screen Sharing vulnerability exploited in the wild
August 17, 2026
The Dutch National Cyber Security Centre (NCSC) issued a warning after being notified of several incidents where a vulnerability in Apple’s Screen Sharing feature was exploited to install Monero cryptominers. The vulnerability, tracked as CVE-2026-65400, was patched by Apple on August 6. It is an authentication-bypass flaw in macOS Screen Sharing that can let an attacker on the network connect ...
- Researchers find ultimate Windows kill switch which can disable antivirus with almost no user interaction
August 14, 2026
Microsoft has recently fixed a vulnerability that allowed threat actors to bypass advanced security measures, disable antivirus software, and expose the target device to full system takeover. All of this, it seems, could have been possible with a very simple script, and a single click from the victim’s side. Luckily, the vulnerability was discovered by white hat hackers, ...
- Patch Tuesday: Update now to fix 421 flaws, including three zero-days
August 12, 2026
Microsoft’s August 2026 Patch Tuesday addresses 421 Microsoft vulnerabilities, including 62 rated Critical. One Windows vulnerability has been exploited in the wild by the Lazarus group to gain SYSTEM privileges. The August update is smaller than July’s record-breaking release, but it’s still among Microsoft’s largest Patch Tuesday batches. More importantly, it includes several flaws likely to attract attacker interest: ...
- The CEVA Logistics data breach is having major knock-on effects across Europe – here’s what we know
August 11, 2026
CEVA Logistics, one of the biggest shipping and logistics companies in the world, has suffered a major cyberattack, the effects of which are trickling down to many of its clients. The details of the hack itself, however, are not yet publicly available and what little information is out there came from the affected clients themselves. CEVA has ...