Vulnerability in Themoos Essential-Moos
CVE-2026-85430
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.017 · change: +0.007
Affected products
Weakness classification (CWE)
References
- github.com/themoos/essential-moos (Product, product)
- github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6… (technical-description, Issue Tracking)
- github.com/themoos/essential-moos/commit/53729b6325a991a8dbd84dcd04e4707f3e592f… (Patch, patch, Issue Tracking)
- github.com/themoos/essential-moos/pull/18 (issue-tracking, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pshare-unauthen… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85430?
- CVE-2026-85430 is a critical-severity vulnerability in Themoos Essential-Moos, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-09-03.
- How severe is CVE-2026-85430?
- Critical severity. CVSS v3 base score is 9.1 out of 10.