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CVE-2026-62778 is an elevation-of-privilege vulnerability in Microsoft Windows DNS caused by a use-after-free condition. Available classification data also associates the flaw with race-condition behavior, indicating the vulnerable code likely involves improper synchronization around shared resources that can lead to stale object reuse. An unauthorized attacker can trigger the flaw over a network to obtain elevated privileges. The issue affects multiple supported Windows client and server releases, including Windows 10 Version 1607 and Windows Server versions from 2012 through 2025, including several Server Core deployments, prior to the patched build levels.
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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.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.