CVE-2009-4893: Unrealircd

Medium severity, CVSS 6.8. EPSS: 2.5% chance of exploitation in the next 30 days.

Buffer overflow in UnrealIRCd 3.2beta11 through 3.2.8, when allow::options::noident is enabled, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.

Affected products

• Unrealircd Unrealircd: version 3.2 only; version 3.2.1 only; version 3.2.2 only; version 3.2.3 only; version 3.2.4 only; version 3.2.5 only; …

Published 2010-06-15. Last modified 2026-06-16.