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CVE-2026-65789 is a CVSS 8.1 use-after-free vulnerability in Windows DNS Server. An unauthorized attacker can trigger the memory-lifetime flaw through network interaction and execute code on an affected DNS server. Exploitation has been observed only in limited scenarios.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free vulnerability permitting remote code execution in Windows DNS.
A Critical-severity remote code execution vulnerability in Windows DNS Server. The content says it requires neither authentication nor user interaction.
A critical remote code execution vulnerability in Windows DNS Server caused by a use-after-free flaw, requiring specific network configurations and timing conditions for exploitation.
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.