---
id: CVE-2026-85454
title: >-
  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
summary: >-
  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-l…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-193
vendor: themoos
product: core-moos
affected:
  - core-moos <= 10.4.0
published: '2026-09-03'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:07:17.943'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85454'
references:
  - url: 'https://github.com/themoos/core-moos'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Utils/MOOSSerialPort.cpp#L595
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/themoos/core-moos/commit/befb04df2039d0080715ea35f56268092db4ec0f
    label: disclosure@vulncheck.com
  - url: 'https://github.com/themoos/core-moos/pull/73'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-off-by-one-buffer-overflow-in-serial-telegram-handling
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00323
epssPercentile: 0.22765
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T13:57:02.987590Z'
ingestedAt: '2026-09-08T15:33:26.959Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.