Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-44801 is a critical remote code execution vulnerability in Microsoft Remote Desktop Client. The provided content describes the flaw as a heap-based buffer overflow / heap-based memory corruption issue and also notes Microsoft mapped it to CWE-416. Exploitation occurs in the client context when a victim uses a vulnerable Remote Desktop Client to connect to an attacker-controlled Remote Desktop Server. A malicious server can trigger the memory corruption condition during the RDP session setup or processing path, leading to arbitrary code execution on the victim machine.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
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 a malicious or attacker-controlled Remote Desktop Server.
The version that knows your environment.
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.