Vulnerability intelligence

CVE-2026-12246

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.

CVSS Score

7.2

High

EPSS — Exploit Probability

0.3%

Riskier than 22% of all CVEs

Exploitation

Not in CISA KEV

No federal exploitation record

Remediation

Patch available

Vendor fix published

NVD entry Vendor patch PoC / advisory

1 article across 1 outlet · first covered Jun 30, 2026 · latest Jun 30, 2026

Coverage timeline

NLnet Labs fixes critical NSD DNS server flaws in new release
securityonline.info · Jun 30, 2026