# CVE-2026-85441

## Summary

- **CVE ID:** CVE-2026-85441
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-195
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 4, 2026

## Description

MOOS core-moos through 10.4.0 fails to validate that serialized string lengths are non-negative in CMOOSMsg::operator>>. Unauthenticated attackers can send a crafted message with a negative length value to the MOOSDB port, causing an unhandled exception that terminates the database process.

## Affected Products

- themoos — core-moos (0)

## References

- [CNA](https://github.com/themoos/core-moos/pull/74)
- [CNA](https://github.com/themoos/core-moos/commit/04c92981091fdaa2ff85e2ba7eff94f6288bdbaf)
- [CNA](https://github.com/themoos/core-moos)
- [CNA](https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Comms/MOOSMsg.cpp#L453)
- [CNA](https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-denial-of-service-via-negative-serialized-string-length)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.37%
- **EPSS Percentile:** 29.9

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