CVE-2026-18916CWE-191

CVE-2026-18916

High · published August 26, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
19.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
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
EPSS
0.00281 · 19.5th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-08-26T13:16Z
Affected products (1)
ProductVersionsFixed in
nlnetlabs/nsd≥ 3.2.11, < 4.15.14.15.1
References (1)
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-18916.txt · [email protected]
EPSS history
Timeline
  • 27 AUG 06:20Z
    EPSS moved — → 0%
    epss
  • 26 AUG 08:39Z
    Remote TCP DoS by throttling the TCP receive window
    cvelistv5