Vulnerability in Themoos Core-Moos
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (23.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/themoos/core-moos (Product, product)
- github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core… (technical-description, Patch, Issue Tracking)
- github.com/themoos/core-moos/commit/befb04df2039d0080715ea35f56268092db4ec0f (Patch, patch, Issue Tracking)
- github.com/themoos/core-moos/pull/73 (issue-tracking, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-off-by-one-buffer-ov… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85454?
- CVE-2026-85454 is a medium-severity vulnerability in Themoos Core-Moos, classified under Off-by-one Error. CVSS score: 6.1/10. Published 2026-09-03.
- How severe is CVE-2026-85454?
- Medium severity. CVSS v3 base score is 6.1 out of 10.