Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck

CVE-2026-85433MOOS essential-moos through 10.0.1 pShare Unauthorized Runtime Route Reconfiguration

Critical 9.8

In plain English

A critical-severity missing authorization in essential-moos from themoos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.8%top 44.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
themoos	essential-moos	0 – through 10.0.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Pull Request #20 issue-tracking, patch
Proposed fix commit (pull request not merged) patch
https://github.com/themoos/essential-moos product
Share.cpp (verified sink) technical-description
VulnCheck Advisory: MOOS essential-moos through 10.0.1 pShare Unauthorized Runtime Route Reconfiguration third-party-advisory