# CVE-2026-85454 — themoos core-moos

> As of 2026-09-03, CVE-2026-85454 is a MEDIUM-severity vulnerability in themoos core-moos, CVSS v3.1 6.1, EPSS 0.2% (12.2th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-85454 as of 2026-09-03; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-03

## What is CVE-2026-85454?

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.

The record classifies CVE-2026-85454 under weakness class [CWE-193](https://cwe.mitre.org/data/definitions/193.html). Its CVSS v3 base vector states that the flaw requires physical access to the device, needs no prior authentication, needs no user interaction, and has high impact on integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 32 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.1 — MEDIUM (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **CVSS v4.0 base score:** 5.2 (`CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 12.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-03

## Is CVE-2026-85454 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [themoos](https://intel.threadlinqs.com/vendors/themoos): core-moos

## How to fix CVE-2026-85454

No vendor patch reference has been recorded for CVE-2026-85454 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-85454

No threat campaign in the Threadlinqs corpus currently references CVE-2026-85454, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, GitHub Security Advisories, FIRST EPSS. Last verified by Threadlinqs on 2026-09-05. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — issue tracking](https://github.com/themoos/core-moos/pull/73)
- [github.com — patch](https://github.com/themoos/core-moos/commit/befb04df2039d0080715ea35f56268092db4ec0f)

**Technical analysis**

- [github.com — technical description](https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Utils/MOOSSerialPort.cpp#L595)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-off-by-one-buffer-overflow-in-serial-telegram-handling)

**Issue tracking and product pages**

- [github.com — product](https://github.com/themoos/core-moos)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-85454
Full detection coverage and IOCs for threats exploiting CVE-2026-85454 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp