# CVE-2026-58594: Microsoft Windows RDP integer overflow remote code execution

Source: https://junglewise.ai/threats/cve-2026-58594-microsoft-windows-rdp-integer-overflow-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-58594 · Severity: high · CVSS 8.8 · Published 2026-07-14

A critical vulnerability has been identified in the Windows Remote Desktop Protocol (RDP), a tool commonly used for remote access to computers and servers. An attacker could exploit this flaw to remotely execute malicious code on a target system, potentially leading to a full system takeover or data theft. While the attack can be initiated over a network, it requires a user to perform an action, such as clicking a malicious link or connecting to a compromised server.

Technologies: [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11), [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10), [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-58594 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58594 being exploited in the wild.

**How severe is CVE-2026-58594?** High severity, with a CVSS score of 8.8, published 14 July 2026.

**Which products and versions are affected?** Microsoft Windows 11 Version 24H2, 25H2, 26H1; Microsoft Windows 10 Version 1607, 1809, 21H2, 22H2; Microsoft Windows Server 2012 Standard and Server Core installations.

**Is there a fix for CVE-2026-58594?** 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-2026-58594 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-58594?** 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

This vulnerability is classified as an integer overflow or wraparound (CWE-190) within the Windows Remote Desktop Protocol (RDP) implementation. The flaw allows an unauthenticated attacker to achieve remote code execution (RCE) by sending specially crafted data over the network. Although the attack vector is network-based, the CVSS vector indicates that user interaction (UI:R) is required, suggesting the victim may need to connect to a malicious RDP server or trigger the exploit through a specific client-side action. Microsoft has released security updates to address this issue across multiple versions of Windows 10, Windows 11, and Windows Server 2012.

## Affected products

- Microsoft Windows 10 Version 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 Version 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 Standard and Server Core installations

## Timeline

- 2026-07-14: disclosed: Initial publication of the CVE record by Microsoft.
- 2026-07-14: advisory: NVD entry published.

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58594](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58594)

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