# CVE-2026-85454

## Summary

- **CVE ID:** CVE-2026-85454
- **Severity:** MEDIUM
- **CVSS Score:** 6.1 (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)
- **CWE:** CWE-193
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 8, 2026

## 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

- themoos — core-moos (0)

## References

- [CNA](https://github.com/themoos/core-moos/pull/73)
- [CNA](https://github.com/themoos/core-moos/commit/befb04df2039d0080715ea35f56268092db4ec0f)
- [CNA](https://github.com/themoos/core-moos)
- [CNA](https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Utils/MOOSSerialPort.cpp#L595)
- [CNA](https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-off-by-one-buffer-overflow-in-serial-telegram-handling)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.22%
- **EPSS Percentile:** 12.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._