Auth bypass in Themoos Essential-Moos
CVE-2026-85433
MOOS essential-moos pShare through 10.0.1 fails to properly authorize PSHARE_CMD messages, allowing any publisher to reconfigure network routes and listeners at runtime. Attackers can send crafted PSHARE_CMD messages with cmd=output or cmd=input parameters to open new listeners on arbitrary addresses and redirect or duplicate bus traffic to attacker-controlled destinations.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.008 · change: +0.004
Affected products
Weakness classification (CWE)
References
- github.com/themoos/essential-moos (Product, product)
- github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6… (Product, technical-description, Issue Tracking)
- github.com/themoos/essential-moos/commit/8e51cedcbd8de9781adec2e9cce354f51750a5… (Patch, patch, Issue Tracking)
- github.com/themoos/essential-moos/pull/20 (issue-tracking, Exploit, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pshare-unauthor… (VDB Entry, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85433?
- CVE-2026-85433 is a critical-severity vulnerability in Themoos Essential-Moos, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-09-03.
- How severe is CVE-2026-85433?
- Critical severity. CVSS v3 base score is 9.8 out of 10.