CVE-2026-56647: Microsoft Windows Remote Access Service privilege escalation

CVE-2026-56647 · Severity: high · CVSS 8.8 · Published 2026-07-14

A security vulnerability has been identified in the Windows Remote Access Service, which is used to provide remote connectivity to corporate networks. An attacker with basic user access can exploit this flaw to gain higher-level administrative privileges across the network. This could allow an unauthorized individual to take full control of affected systems, potentially leading to data theft or significant operational disruption.

Technologies: Microsoft Windows 11, Microsoft Windows Server 2012 R2, Microsoft Windows 10. Vendors: Microsoft.

Quick answers

Is CVE-2026-56647 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-56647 being exploited in the wild.
How severe is CVE-2026-56647?
High severity, with a CVSS score of 8.8, published 14 July 2026.
Which products and versions are affected?
Microsoft Windows 11 10.0.26100.0 to 10.0.26100.8875; Microsoft Windows Server 2012 R2 6.3.9600.0 to 6.3.9600.23291; Microsoft Windows 10 10.0.14393.0 to 10.0.14393.9339.
Is there a fix for CVE-2026-56647?
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-2026-56647 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-56647?
Check whether you run Microsoft Windows 11, Microsoft Windows Server 2012 R2 or Microsoft Windows 10 at an affected version. 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

This vulnerability is classified as an integer overflow or wraparound (CWE-190) within the Windows Remote Access Service (RAS) Infrastructure. An attacker with low-privileged credentials can exploit this flaw over the network without any user interaction. Successful exploitation allows the attacker to elevate their privileges to a higher level, potentially gaining full system control. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. Microsoft has released security updates to address this issue.

Affected products

  • Microsoft Windows 10 Version 1607 10.0.14393.0 to 10.0.14393.9339
  • Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
  • Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
  • Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
  • Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
  • Microsoft Windows Server 2012 R2 6.3.9600.0 to 6.3.9600.23291

Timeline

  • 2026-07-14: advisory
  • 2026-07-14: disclosed

References

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