CVE-2005-2991: Ncompress

Low severity, CVSS 2.1. EPSS: 0.4% chance of exploitation in the next 30 days.

ncompress 4.2.4 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files using (1) zdiff or (2) zcmp, a different vulnerability than CVE-2004-0970.

Affected products

• Ncompress Ncompress: up to and including 4.2.4_r1

Published 2005-09-20. Last modified 2026-06-16.