CVE-2026-12246NVD

Vulnerability Summary

NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.

Severity Level

UNKNOWN

Published Date

Jun 25, 2026

Last Modified

Jun 25, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.30%Probability

Root Weakness (CWE)

CWE-120: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CWE-20: Improper Input Validation ↗

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required.

CVSS v4.0 Base Metrics — Score 7.2 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredLow

User InteractionNone

Confidentiality (Vulnerable System)None

Integrity (Vulnerable System)High

Availability (Vulnerable System)High

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

NLnet Labs NSD >= 4.14.0 and < 4.14.3

Patched Versions

NLnet Labs NSD 4.14.3

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