Is CVE-2026-56190 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-56190 being exploited in the wild.

How severe is CVE-2026-56190?

Critical severity, with a CVSS score of 9.8, published 14 July 2026.

Which products and versions are affected?

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

Is there a fix for CVE-2026-56190?

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-2026-56190 attacked?

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

Am I affected by CVE-2026-56190?

Check whether you run Microsoft Windows 11, Microsoft Windows 10 or Microsoft Windows Server 2012 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-2026-56190: Microsoft Windows RDP remote code execution via uninitialized resource

CVE-2026-56190 · Severity: critical · CVSS 9.8 · Published 2026-07-14

A critical vulnerability exists in the Windows Remote Desktop Protocol (RDP), which is used to remotely access and manage computers. An unauthorized attacker can exploit this flaw over a network to take full control of a vulnerable system without any user interaction. This could lead to complete data theft, system outages, or the deployment of ransomware across the corporate network.

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

Quick answers

Is CVE-2026-56190 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-56190 being exploited in the wild.
How severe is CVE-2026-56190?: Critical severity, with a CVSS score of 9.8, published 14 July 2026.
Which products and versions are affected?: Microsoft Windows 11 24H2, 25H2, 26H1; Microsoft Windows 10 1607, 1809, 21H2, 22H2; Microsoft Windows Server 2012 All editions.
Is there a fix for CVE-2026-56190?: 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-2026-56190 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-56190?: Check whether you run Microsoft Windows 11, Microsoft Windows 10 or Microsoft Windows Server 2012 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

A remote code execution vulnerability exists in the Microsoft Windows Remote Desktop Protocol (RDP) due to the use of an uninitialized resource (CWE-908). The flaw allows an unauthenticated, remote attacker to send specially crafted requests to a target system's RDP service. Successful exploitation enables the attacker to execute arbitrary code with high privileges on the host system. The vulnerability is network-exploitable with low complexity and requires no user interaction. Microsoft has released security updates to address this issue across affected Windows and Windows Server versions.

Affected products

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

Timeline

2026-07-14: disclosed: Vulnerability published by Microsoft and NVD.
2026-07-14: advisory: MSRC advisory released.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56190

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