# CVE-2026-85442

## Summary

- **CVE ID:** CVE-2026-85442
- **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-789
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 4, 2026

## Description

MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten(), allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory and cause denial of service before client authentication completes.

## Affected Products

- themoos — core-moos (0)

## References

- [CNA](https://github.com/themoos/core-moos/pull/81)
- [CNA](https://github.com/themoos/core-moos/commit/e7ea624a7b7828b47fcd35fc43feec1f5cfbbe21)
- [CNA](https://github.com/themoos/core-moos)
- [CNA](https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Comms/MOOSCommPkt.cpp#L99)
- [CNA](https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-denial-of-service-via-unbounded-packet-allocation)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.41%
- **EPSS Percentile:** 34.7

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