CVE-2020-5254: Nethack

High severity, CVSS 8.1. EPSS: 1.1% chance of exploitation in the next 30 days.

In NetHack before 3.6.6, some out-of-bound values for the hilite_status option can be exploited. NetHack 3.6.6 resolves this issue.

Affected products

• Nethack Nethack: from 3.6.1, before 3.6.6 (fixed in 3.6.6)

Published 2020-03-10. Last modified 2026-06-17.