Is CVE-2026-50666 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-50666 being exploited in the wild.

How severe is CVE-2026-50666?

High severity, with a CVSS score of 8.8, published 14 July 2026.

Which products and versions are affected?

Microsoft Windows 11 24H2, 25H2, 26H1; Microsoft Windows Server 2012 R2 All versions; Microsoft Windows 10 1607, 1809, 21H2, 22H2.

Is there a fix for CVE-2026-50666?

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-2026-50666 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-50666?

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.

CVE-2026-50666: Microsoft Windows Remote Access Connection Manager use after free privilege escalation

CVE-2026-50666 · Severity: high · CVSS 8.8 · Published 2026-07-14

A security vulnerability has been identified in the Windows Remote Access Connection Manager, a component that handles network and VPN connections. An attacker with basic user access to the network could exploit this flaw to gain higher-level administrative privileges on a target system. This could allow an unauthorized individual to take full control of affected computers, potentially leading to data theft or further network compromise.

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

Quick answers

Is CVE-2026-50666 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-50666 being exploited in the wild.
How severe is CVE-2026-50666?: High severity, with a CVSS score of 8.8, published 14 July 2026.
Which products and versions are affected?: Microsoft Windows 11 24H2, 25H2, 26H1; Microsoft Windows Server 2012 R2 All versions; Microsoft Windows 10 1607, 1809, 21H2, 22H2.
Is there a fix for CVE-2026-50666?: 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-2026-50666 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-50666?: 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 a Use-After-Free (CWE-416) within the Windows Remote Access Connection Manager (rasman.dll). The flaw is reachable over the network and requires low-privileged authentication (PR:L). By sending specially crafted requests to the service, an attacker can trigger memory corruption to execute arbitrary code or gain SYSTEM-level privileges. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server 2012 R2. Microsoft has released security updates to address this issue; users should apply the latest cumulative updates for their respective OS versions.

Affected products

Microsoft Windows 10 1607, 1809, 21H2, 22H2
Microsoft Windows 11 24H2, 25H2, 26H1
Microsoft Windows Server 2012 R2 All versions

Timeline

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

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50666

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.