Security
Critical Unbound DNSSEC Validator Flaw Could Allow RCE via a Malicious DNS Zone
The Hacker News·September 17, 2026·1 min read
NLnet Labs disclosed a critical heap overflow in the DNSSEC validator of every Unbound DNS resolver release before 1.26.1, tracked as CVE-2026-81642. An attacker controlling a malicious zone can trigger it via a query, enabling remote code execution. Unbound 1.26.1, released Wednesday, fixes the flaw. Administrators are urged to update immediately to prevent exploitation.
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