CVE-2026-85430: MOOS essential-moos through 10.0.1 pShare Unauthenticated UDP Datagram Republishing

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-03 · updated 2026-10-14
Weakness: CWE-345

Description

MOOS essential-moos through 10.0.1 contains an authentication bypass vulnerability in pShare that accepts UDP datagrams from any source and republishes them with the attacker-claimed identity intact. Attackers can send crafted UDP datagrams to pShare input routes to inject messages into the local MOOS community under spoofed identities, or send malformed datagrams to crash the pShare process.

Affected products

themoos essential-moos: through 10.0.1

References

https://github.com/themoos/essential-moos
https://github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6/Essentials/pShare/Listener.cpp#L132
https://github.com/themoos/essential-moos/commit/53729b6325a991a8dbd84dcd04e4707f3e592fd6
https://github.com/themoos/essential-moos/pull/18
https://www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pshare-unauthenticated-udp-datagram-republishing

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