7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7epss 0.9%
from disclosure to weapon0 days
Published on NVDJul 29
1st PoCJul 17
exploitation probability
0.9%top 43% of all CVEs
observed exploitation
nono source reports it
3 public exploit(s)
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.
CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
7-Zip · 7-Zippublic PoCs found — 3
githubgithub.com/4minx/CVE-2026-14266★ 1githubgithub.com/hg0434hongzh0/CVE-2026-14266★ 0githubgithub.com/liyuxuan504-byte/CVE-2026-14266★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.