Remote Code Execution in Windows Remote Desktop Client
CVE-2026-44799 is a critical heap-based buffer overflow vulnerability in the Windows Remote Desktop Client. Microsoft states that the flaw allows an unauthorized attacker to execute code over a network. The issue is triggered when a victim uses a vulnerable Remote Desktop Client to connect to an attacker-controlled Remote Desktop Server, which can cause a heap-based buffer overflow in the client and lead to code execution on the victim machine. Available reporting identifies the weakness as CWE-122 and notes Microsoft assigned CVSS v3.1 vector AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
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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. Exploitation requires user interaction and a malicious or attacker-controlled Remote Desktop Server that the victim connects to.
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.