CVE-2026-85442: Themoos Core-Moos

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten(), allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory and cause denial of service before client authentication completes.

Affected products

• Themoos Core-Moos: up to and including 10.4.0

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