CVE-2026-14266

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.zerodayinitiative.com/advisories/ZDI-26-444/	Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2026/07/17/12	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-29 18:16

Updated : 2026-08-07 20:48

NVD link : CVE-2026-14266

Mitre link : CVE-2026-14266

CVE.ORG link : CVE-2026-14266

JSON object : View

Products Affected

7-zip

7-zip

CWE

CWE-122

Heap-based Buffer Overflow

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