CVE-2026-12490 | BDVDB-2026-343049 Detail

NLnet LabsNSD

Description#

When a provide-xfr is given with a tls-auth-name, a secondary requesting a transfer should provide a client certificate with that name. However, no client certificate is needed when the request comes in over TLS over the regular tls-port (and not the tls-auth-port) or over over TCP over the regular port, when the other conditions of the provide-xfr rule match.

Impact#

Per CVSS v4.0: confidentiality impact high, integrity impact none, availability impact none. Attack vector: network.

Weaknesses#

CWE-306 Missing Authentication for Critical Function
CWE-284 Improper Access Control

References#

https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12490.txt

Exploit#

No public exploit known

History#

Version 12026-06-25Record published in the CVE List.

Published

Published: 2026-06-25
Last modified: 2026-06-25

Vendor information

Vendor: NLnet Labs
Product: NSD

All NLnet Labs vulnerabilities

Score

8.2 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 12.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 4.10.1 and < 4.14.3
Fixed
4.14.3

Scoring System

CVSS v4.0

8.2 High

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Attack Requirements	None
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality	High
Vulnerable System Integrity	None
Vulnerable System Availability	None
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).