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CVE-2026-62893 is a critical use-after-free vulnerability in Windows Deployment Services (WDS) TFTP Server. The flaw is reachable over the network through the service’s TFTP request handling and affects WDS deployments used for PXE boot and network-based operating system deployment, particularly scenarios where Windows Imaging Format (WIM) files are served via TFTP. Available reporting describes the issue as a failure to validate the existence of an object before performing operations on it, resulting in a use-after-free condition that can be triggered by an unauthenticated attacker without user interaction. Successful exploitation can lead to arbitrary code execution in the context of the vulnerable service.
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What an attacker gets, and what they’ve been doing with it.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical use-after-free remote code execution vulnerability in Windows Deployment Services TFTP Server that can be exploited remotely without authentication. It is significant because the service is commonly exposed for PXE boot and Microsoft assesses exploitation as more likely.
A remote code execution vulnerability affecting Windows Deployment Services TFTP.
A critical remote code execution vulnerability in Windows Deployment Services TFTP Server that can be exploited remotely without authentication or user interaction.
A remote unauthenticated code execution vulnerability in Windows Deployment Services reachable via the service's TFTP handling.
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.