CVE-2026-85424: Themoos Core-Moos

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

MOOS core-moos through 10.4.0 lacks authentication in the wire protocol, allowing unauthenticated clients to connect with full publish, subscribe, and database clear privileges. Attackers can bypass the compile-time protocol string check and connect with arbitrary client names to execute privileged operations including DB_CLEAR which resets all variables and clears client mail queues.

Affected products

• Themoos Core-Moos: up to and including 10.4.0

Published 2026-09-03. Last modified 2026-09-08.