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

0.4%

Riskier than 36% of all CVEs · checked 2026-09-28

Exploitation

Not in CISA KEV

KEV does not include every exploited vulnerability

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

Related CVEs — NLnet Labs

CVE-2026-81642 CVE-2026-81634 CVE-2026-82717 CVE-2026-12244 CVE-2026-12245 CVE-2026-12490 CVE-2026-33278 CVE-2026-42944