High-Risk CVE-2026-125742 in 7-Zip Affects Users via CAB Extraction
Article Content
- •CVE-2026-125742 affects 7-Zip versions before 26.06.
- •Attackers can exploit the vulnerability via crafted CAB archives.
- •Users are urged to upgrade to the fixed release immediately.
A heap out-of-bounds write vulnerability (CVE-2026-125742) has been identified in 7-Zip versions before 26.06. This flaw allows attackers to exploit memory corruption when users extract specially crafted multi-volume CAB archives, potentially leading to arbitrary code execution. The vulnerability is classified as high severity with a CVSS score of 8.5. Users of Windows endpoints with 7-Zip installed, particularly those handling untrusted archives, are most at risk. Attackers may deliver malicious archives via email or downloads to gain control over the affected user's process. As of now, there is no confirmed active exploitation reported, but users are advised to upgrade to the patched version immediately. The vulnerability was published on November 10, 2026.
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