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Vulnerability record · CVE-2026-85424 · published 3 September 2026

CVE-2026-85424: Missing authentication for critical function vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 0.82% · top 44.5% CWE-306 · Missing authentication for critical function Awaiting Analysis
9.3CVSS 4.0 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
8 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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/core-moos
https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/DB/MOOSDB.cpp#L1163
https://github.com/themoos/core-moos/commit/5ff5cdec44242156a168cc1a545a6a21357bd3ac
https://github.com/themoos/core-moos/pull/84
https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-missing-authentication-for-moosdb-publish-subscribe-a

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Source: NIST National Vulnerability Database (record CVE-2026-85424), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.