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CVE-2026-42913 is a Microsoft Remote Desktop Client remote code execution vulnerability. Microsoft describes the issue as a heap-based buffer overflow in the Remote Desktop Client that is associated with a race condition and a use-after-free condition. Successful exploitation occurs when a victim uses a vulnerable Remote Desktop Client to connect to an attacker-controlled Remote Desktop Server, allowing the malicious server to trigger the memory corruption condition on the client side. Microsoft classifies the flaw as network-exploitable with no privileges required, but exploitation requires user interaction and high attack complexity because the attacker must win a race condition.
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No public exploit code observed for this vulnerability.
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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Remote Desktop Client remote code execution vulnerability triggered when a victim connects to an attacker-controlled server, leading to a heap-based buffer overflow.
A remote code execution vulnerability in Microsoft Remote Desktop Client caused by a race condition/use-after-free leading to a heap-based buffer overflow. Exploitation requires user interaction and high attack complexity, such as winning a race condition when a victim connects to an attacker-controlled Remote Desktop Server.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.