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CVE-2026-48563 is a critical remote code execution vulnerability in Microsoft Remote Desktop Client. The flaw is described by Microsoft as a use-after-free condition and is also characterized in reporting as a heap-based memory corruption issue that can be triggered during processing of data from a Remote Desktop connection. Successful exploitation requires a victim to use a vulnerable Remote Desktop Client to connect to an attacker-controlled Remote Desktop Server. Microsoft indicates exploitation involves winning a race condition, which contributes to high attack complexity. If triggered, the memory corruption can allow arbitrary code execution in the context of the client system.
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No public exploit code observed for this vulnerability.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical heap-based buffer overflow remote code execution vulnerability in Windows Remote Desktop Client triggered by connecting to a malicious RDP server.
A critical remote code execution vulnerability in Windows Remote Desktop Client caused by a heap-based buffer overflow.
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 critical remote code execution vulnerability in Microsoft Remote Desktop Client caused by a heap-based buffer overflow/use-after-free condition. Exploitation requires user interaction and high attack complexity, such as winning a race condition, and can be triggered when a victim connects to a malicious Remote Desktop Server.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.