CVE-2026-14266: 7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-14266?
The severity of CVE-2026-14266 is high, rated at 7.
How do I fix CVE-2026-14266?
To fix CVE-2026-14266, update your installation of 7-Zip to the latest version that addresses this vulnerability.
What are the potential impacts of exploiting CVE-2026-14266?
Exploiting CVE-2026-14266 can allow remote attackers to execute arbitrary code on the affected system.
Is user interaction required to exploit CVE-2026-14266?
Yes, user interaction is required to exploit CVE-2026-14266, as the user must either visit a malicious page or open a malicious file.
Which software is affected by CVE-2026-14266?
CVE-2026-14266 affects installations of 7-Zip.