Vulnerability · NVD

CVE-2026-14266

CVE-2026-14266, high severity (CVSS 7.8): 1 tracked app concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 7.8
Exploitation: 0.7 %
Tracked apps: 1
Still exposed: 0

Published on 2026-07-29

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.

Attack vector : Local No privileges required

Show raw CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS 0.74% above median percentile 52.7%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

7-Zip Windows winget:7zip.7zip

Affected <26.02 Fixed in 26.02 Latest tracked 26.03 patched

Observed affected builds (20)

26.01 26.00 25.01 25.00 24.09 24.08 24.07 24.06 24.05 23.01 22.01 22.00 21.07 21.06 19.00 19.00.00.0 18.06 18.05 18.01 16.04

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
7-zip	7-zip All platforms (wildcard)	All platforms (wildcard)	<26.02	cpe:2.3:a:7-zip:7-zip::::::::

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