Quick answers
- Is CVE-2026-78463 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78463 being exploited in the wild.
- How severe is CVE-2026-78463?
- High severity, with a CVSS score of 8.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Remote Desktop Client.
- Is there a fix for CVE-2026-78463?
- 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-2026-78463 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-78463?
- 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 code injection vulnerability exists in Microsoft Remote Desktop Client due to improper control of code generation. The vulnerability allows an unauthenticated attacker on the network to inject and execute arbitrary code on a system running the affected Remote Desktop Client. This is a network-based attack requiring no user interaction or prior authentication. Successful exploitation grants the attacker the ability to execute code with the privileges of the user running the client. A patch is expected from Microsoft via their Security Response Center.
Affected products
- Microsoft Remote Desktop Client
Timeline
- 2026-09-08: disclosed