# CVE-2026-84012: Microsoft Remote Desktop Gateway Service double free

Source: https://junglewise.ai/threats/cve-2026-84012-double-free-in-remote-desktop-gateway-service-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-84012 · Severity: high · CVSS 8.1 · Published 2026-10-13

A double-free memory vulnerability in Microsoft's Remote Desktop Gateway Service allows an attacker on the network to execute arbitrary code without authentication. This could give an attacker complete control over systems using Remote Desktop Gateway, potentially leading to data theft, lateral movement in corporate networks, or deployment of malware.

Technologies: [Microsoft Remote Desktop Gateway Service](https://junglewise.ai/threats/technologies/remote-desktop-gateway-service), [Microsoft Windows 10 1607](https://junglewise.ai/threats/technologies/windows-10-1607), [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809), [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012), [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016), [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019), [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-84012 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84012 being exploited in the wild.

**How severe is CVE-2026-84012?** High severity, with a CVSS score of 8.1, published 13 October 2026.

**Which products and versions are affected?** Microsoft Remote Desktop Gateway Service.

**Is there a fix for CVE-2026-84012?** 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-2026-84012 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-84012?** Check whether you run Microsoft Remote Desktop Gateway Service, Microsoft Windows 10 1607, Microsoft Windows 10 1809 or one of the others listed. 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 double-free vulnerability in the Remote Desktop Gateway Service allows network-based remote code execution without requiring prior authentication. The vulnerability is in memory management of the service, enabling an attacker to manipulate freed memory allocations and achieve code execution. This is a critical flaw in a service commonly deployed to provide secure remote access to corporate resources.

## Affected products

- Microsoft Remote Desktop Gateway Service

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84012](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84012)

## Related threats

- [Microsoft Remote Desktop Gateway Service use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-80094-use-after-free-in-remote-desktop-gateway-service-allows-an)
- [Microsoft Remote Desktop Gateway Service use-after-free](https://junglewise.ai/threats/cve-2026-69565-use-after-free-in-remote-desktop-gateway-service-allows-an)
- [Microsoft Remote Desktop Gateway Service use-after-free](https://junglewise.ai/threats/cve-2026-69327-use-after-free-in-remote-desktop-gateway-service-allows-an)
- [Windows DNS Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-97844-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97843-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)