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CVE-2026-13321 is an improper DNSSEC validation flaw in the BIND resolver. BIND accepts validly signed NSEC records when the record's Next Domain Name field names a domain outside the signing zone, rather than rejecting the invalid zone relationship. This can cause the resolver to make incorrect DNSSEC validation decisions. Affected versions are BIND 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, BIND Supported Preview Edition 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
44 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-reachable, low-complexity vulnerability requiring no privileges or user interaction. The supplied CVSS v3 vector indicates high integrity impact and changed scope; it is addressed by Fedora advisory 2026-0adbf9c133.
A network-accessible, low-complexity vulnerability requiring no privileges or user interaction, with high integrity impact and changed scope, affecting BIND-related packages on Alibaba Cloud Linux 3.
A network-accessible, low-complexity vulnerability requiring no privileges or user interaction, with high integrity impact and changed scope according to the supplied CVSS v3 vector. It is addressed by the Fedora update.
A network-accessible, low-complexity vulnerability affecting integrity, with no privileges or user interaction required, according to the provided CVSS v3 vector. It is addressed by the Fedora 43 BIND advisory.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.