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CVE-2026-62878 is a critical remote code execution vulnerability in Windows DNS Server caused by a stack-based buffer overflow. The flaw is reachable over the network and can be triggered against exposed DNS Server instances without authentication and without user interaction. Available reporting characterizes the issue as a classic stack-based overflow in the DNS service that can result in attacker-controlled code execution in the context of the vulnerable service, with elevated privileges. The vulnerability has also been described as wormable, indicating that successful exploitation may be automatable and suitable for self-propagating attacks between vulnerable systems.
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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.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical wormable stack-based buffer overflow remote code execution vulnerability in Windows DNS Server that is reachable over the network without authentication or user interaction. It is significant because successful exploitation can lead to SYSTEM-level compromise and potentially full domain compromise on domain controllers.
A remote code execution vulnerability affecting Windows DNS Server, notable because compromise of DNS infrastructure can have broad enterprise impact.
A critical wormable remote code execution vulnerability in Windows DNS Server caused by a stack-based buffer overflow and requiring no user interaction.
A remote unauthenticated stack-based buffer overflow in Windows DNS Server that can lead to remote code execution and is described as technically wormable.
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.