CVE-2017-7523: Cygwin

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

Cygwin versions 1.7.2 up to and including 1.8.0 are vulnerable to buffer overflow vulnerability in wcsxfrm/wcsxfrm_l functions resulting into denial-of-service by crashing the process or potential hijack of the process running with administrative privileges triggered by specially crafted input string.

Affected products

• Cygwin Cygwin: version 1.7.2 only; version 1.7.3 only; version 1.7.5 only; version 1.7.6 only; version 1.7.7 only; version 1.7.8 only; …

Published 2017-07-21. Last modified 2026-06-17.