CVE-2026-85441: Themoos Core-Moos

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

MOOS core-moos through 10.4.0 fails to validate that serialized string lengths are non-negative in CMOOSMsg::operator>>. Unauthenticated attackers can send a crafted message with a negative length value to the MOOSDB port, causing an unhandled exception that terminates the database process.

Affected products

• Themoos Core-Moos: up to and including 10.4.0

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