# CVE-2026-70587: Microsoft Windows Remote Desktop Protocol information disclosure

Source: https://junglewise.ai/threats/cve-2026-70587-microsoft-windows-remote-desktop-protocol-information-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-70587 · Severity: high · CVSS 7.5 · Published 2026-09-08

Windows Remote Desktop Protocol (RDP) contains a flaw in null termination handling that allows unauthenticated attackers to read sensitive information over a network connection. RDP is a core Windows component used for remote system access and administration. This vulnerability could expose confidential data without requiring valid credentials or user interaction.

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-2026-70587 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70587 being exploited in the wild.

**How severe is CVE-2026-70587?** High severity, with a CVSS score of 7.5, published 8 September 2026.

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

**Is there a fix for CVE-2026-70587?** 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-2026-70587 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-70587?** 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

The vulnerability is an improper null termination issue in the Windows Remote Desktop Protocol implementation. It allows unauthenticated, network-based attackers to disclose information from affected systems. The flaw likely results in buffer over-read or information leakage when RDP processes improperly terminated protocol messages. No authentication is required; the attack is delivered over the network to standard RDP listening ports. An attacker can extract sensitive data from memory or process state without established credentials.

## Affected products

- Microsoft Windows Remote Desktop Protocol

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70587](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70587)

## Related threats

- [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)
- [Microsoft Windows RDP out-of-bounds read](https://junglewise.ai/threats/cve-2026-42908-microsoft-windows-rdp-out-of-bounds-read)