VULNERABILITY INTELLIGENCE

CVE-2026-14266

CVSS score7.8 HIGH
EPSS probability0.74%
CISA KEVNot currently listed
Published2026-07-29
Last modified2026-08-07
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.

Weakness classification

  • CWE-122: Heap-based Buffer Overflow

Primary references