CVE-2023-36802 Microsoft Streaming Service Proxy Privilege Escalation
An attacker can exploit a use-after-free flaw in the Microsoft Streaming Service Proxy to gain elevated privileges on Windows systems.
- Exploited in the wild
- Since 12 Sep 2023
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-36802?
CVE-2023-36802 is a high-severity use after free vulnerability in Microsoft Windows 10 1809, published on 12 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability
Weakness: CWE-416
Which versions are affected by CVE-2023-36802?
It affects 7 products.
Products include Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 21h2, Microsoft Windows 11 22h2, Microsoft Windows Server 2019 and 1 more.
How do I fix CVE-2023-36802?
No fix has been published for CVE-2023-36802 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 Oct 2023.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-36802 being exploited?
Yes. Attackers have exploited CVE-2023-36802 in the wild since at least 12 Sep 2023.
Public exploit code: 6 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows 10 1809
- CVE-2024-29988 Microsoft SmartScreen Prompt Security Feature Bypass
- CVE-2024-21412 Microsoft Windows Internet Shortcut Files Security Feature Bypass
- CVE-2025-62221 Microsoft Windows Use After Free
- CVE-2025-30400 Microsoft Windows DWM Core Library Use-After-Free
- CVE-2024-21338 Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control
Sources
Also known as GHSA-4v34-9x49-p452.