CVE-2026-85436: Themoos Essential-Moos

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

MOOS essential-moos through 10.0.1 contains a buffer overflow vulnerability in CMOOSUDPLink::ReadPktFromArray() that allows remote attackers to corrupt heap memory by sending UDP datagrams with negative declared lengths. Attackers can send crafted UDP packets to the configured UDPListen port to trigger an oversized memcpy operation that writes past the destination buffer, causing heap corruption and denial of service.

Affected products

• Themoos Essential-Moos: up to and including 10.0.1

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