CVE-2026-69998: Microsoft Remote Desktop Client use after free remote code execution

CVE-2026-69998 · Severity: high · CVSS 7.5 · Published 2026-10-13

A use-after-free vulnerability in Microsoft Remote Desktop Client allows an attacker to execute arbitrary code on a user's system by sending specially crafted data over the network. An attacker with network access could exploit this to gain unauthorized code execution, potentially compromising the affected computer and any systems it can access.

Technologies: Microsoft Remote Desktop Client. Vendors: Microsoft.

Quick answers

Is CVE-2026-69998 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-69998 being exploited in the wild.
How severe is CVE-2026-69998?
High severity, with a CVSS score of 7.5, published 13 October 2026.
Which products and versions are affected?
Microsoft Remote Desktop Client.
Is there a fix for CVE-2026-69998?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-69998 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-69998?
Check whether you run Microsoft Remote Desktop Client. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free memory corruption vulnerability in Remote Desktop Client enables remote code execution when processing network traffic. An unauthenticated attacker on the network can trigger the vulnerability by sending crafted RDP protocol packets, leading to memory corruption and potential arbitrary code execution in the context of the RDP client process.

Affected products

  • Microsoft Remote Desktop Client

Timeline

  • 2026-10-13: disclosed

References

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