CVE-2025-1240: Winzip

High severity, CVSS 8.8. EPSS: 10.3% chance of exploitation in the next 30 days.

WinZip 7Z File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of WinZip. 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 parsing of 7Z files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-24986.

Affected products

• Winzip Winzip: from 18.0, before 18.0.16371 (fixed in 18.0.16371); from 27.0, before 27.0.16370 (fixed in 27.0.16370); from 76.0, before 76.8 (fixed in 76.8)

Published 2025-02-11. Last modified 2026-06-17.