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Vulnerability record · CVE-2026-85436 · published 3 September 2026

CVE-2026-85436: MOOS essential-moos through 10.0.1 contains a buffer overflow vulnerability in CMOOSUDPLink::ReadPktFromArray(…

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.

8.7 CVSS 4.0 High EPSS 2.1% · top 19.1% CWE-191 · CWE-191 Awaiting Analysis
8.7CVSS 4.0 base score
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
8 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/themoos/essential-moos
https://github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6/Essentials/pMOOSBridge/MOOSUDPLi
https://github.com/themoos/essential-moos/commit/613175fcf63fb9c6c5329c4ec57c2d18588b33e2
https://github.com/themoos/essential-moos/pull/21
https://www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pmoosbridge-heap-corruption-via-negative-udp-len

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Source: NIST National Vulnerability Database (record CVE-2026-85436), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.