# CVE-2026-42908: Microsoft Windows RDP out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-42908-microsoft-windows-rdp-out-of-bounds-read  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-42908 · Severity: high · CVSS 7.5 · Published 2026-06-09

A security vulnerability has been identified in the Windows Remote Desktop Protocol (RDP), which is used to remotely access and manage computers. An unauthorized attacker could exploit this flaw over a network to access sensitive information that should otherwise be protected. This could lead to the exposure of system memory or configuration details, potentially aiding further attacks against the organization.

Technologies: [Microsoft Windows Remote Desktop Protocol](https://junglewise.ai/threats/technologies/windows-remote-desktop-protocol). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-42908 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42908 being exploited in the wild.

**How severe is CVE-2026-42908?** High severity, with a CVSS score of 7.5, published 9 June 2026.

**Which products and versions are affected?** Microsoft Windows Remote Desktop Protocol (RDP).

**Is there a fix for CVE-2026-42908?** 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-2026-42908 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-42908?** Check whether you run Microsoft Windows Remote Desktop Protocol. 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

An out-of-bounds read vulnerability (CWE-125) exists in the Microsoft Windows Remote Desktop Protocol (RDP) implementation. The flaw is triggered when the RDP service improperly handles specially crafted network packets, allowing an attacker to read data beyond the intended buffer. This is a network-based attack that requires no authentication or user interaction (AV:N/AC:L/PR:N/UI:N). Successful exploitation results in the unauthorized disclosure of information from the memory space of the RDP service. Microsoft has released information regarding this vulnerability via their Security Update Guide.

## Affected products

- Microsoft Windows Remote Desktop Protocol (RDP)

## Timeline

- 2026-06-09: disclosed
- 2026-06-09: advisory: Published by Microsoft and NVD

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42908](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42908)

## Related threats

- [Microsoft Windows Remote Desktop Protocol information disclosure](https://junglewise.ai/threats/cve-2026-70587-microsoft-windows-remote-desktop-protocol-information-disclosure)
- [Microsoft Windows RDP out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-45639-microsoft-windows-rdp-out-of-bounds-read-information-disclosure)