Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck
CVE-2026-85454MOOS core-moos through 10.4.0 Off-by-One Buffer Overflow in Serial Telegram Handling
Medium 6.1
In plain English
A medium-severity security flaw in core-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 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.3%top 74.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
MOOS core-moos through 10.4.0 contains a buffer overflow vulnerability in CMOOSSerialPort::GetTelegram() that writes a NUL terminator one byte past the serial telegram stack buffer. Attackers controlling the serial line can send a full-length telegram to trigger the off-by-one write, corrupting the stack and potentially enabling code execution.
Affected products (as reported)
Weakness: CWE-193 · Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
References
- Pull Request #73 issue-tracking, patch
- Proposed fix commit (pull request not merged) patch
- https://github.com/themoos/core-moos product
- MOOSSerialPort.cpp (verified sink) technical-description
- VulnCheck Advisory: MOOS core-moos through 10.4.0 Off-by-One Buffer Overflow in Serial Telegram Handling third-party-advisory