# CVE-2026-18916

## Summary

- **CVE ID:** CVE-2026-18916
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-191
- **Published:** Aug 26, 2026
- **Last Modified:** Aug 26, 2026

## Description

Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance.

## Affected Products

- NLnet Labs — NSD (3.2.11)

## References

- [CNA](https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-18916.txt)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 29.0

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