7.5highHigh
CVE-2026-18916
Nlnetlabs Nsd
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.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- CVSS v4
- 6.9
- Weakness
- CWE-191
- Assigned by
- sep@nlnetlabs.nl
Dates
- Published
- 2026-08-26
- Last modified
- 2026-09-08
- Sources
- NVD
Affected products
- Nlnetlabs Nsd3.2.11 - 4.15.1
As listed in the NVD configuration data. Not a statement about your estate.