# CVE-2026-85443

## Summary

- **CVE ID:** CVE-2026-85443
- **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-400
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 14, 2026

## Description

MOOS core-moos through 10.4.0 contains a denial of service vulnerability in MOOSCommServer::ListenLoop() where the accept thread performs a blocking receive without timeout during the wire-protocol handshake. An attacker can open a TCP connection to the MOOSDB port and send no data, causing the accept thread to block indefinitely while holding the socket-list lock, preventing all subsequent client connections.

## Affected Products

- themoos — core-moos (0)

## References

- [CNA](https://github.com/themoos/core-moos/pull/83)
- [CNA](https://github.com/themoos/core-moos/commit/8d940303949a850d4625eca2a60f27adee9c3ec4)
- [CNA](https://github.com/themoos/core-moos)
- [CNA](https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Comms/MOOSCommServer.cpp#L922)
- [CNA](https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-accept-loop-denial-of-service)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._