# CVE-2023-36802: Microsoft Streaming Service Proxy Privilege Escalation Vulnerability

Source: https://junglewise.ai/threats/cve-2023-36802-microsoft-streaming-service-proxy-privilege-escalation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-09-12. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2023-36802 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2023-09-12

Microsoft Streaming Service Proxy contains a use-after-free vulnerability (CWE-416) that allows for local privilege escalation. An attacker who successfully exploits this vulnerability could gain SYSTEM privileges.

Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2023-36802 exploited in the wild?** Yes. CVE-2023-36802 is known to be exploited in the wild, first recorded on 12 September 2023. Treat it as urgent.

**How severe is CVE-2023-36802?** Critical severity, with a CVSS score of 7.8, published 12 September 2023.

**Which products and versions are affected?** Microsoft Windows 10 1809, 21H2, 22H2; Microsoft Windows 11 21H2, 22H2; Microsoft Windows Server 2019 All versions; Microsoft Windows Server 2022 All versions.

**Is there a fix for CVE-2023-36802?** A patch was published on 2023-09-12. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-36802 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2023-36802?** Check whether you run Microsoft Streaming Service Proxy. 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.

## Affected products

- Microsoft Windows 10 1809, 21H2, 22H2
- Microsoft Windows 11 21H2, 22H2
- Microsoft Windows Server 2019 All versions
- Microsoft Windows Server 2022 All versions

## Timeline

- 2023-09-12: disclosed
- 2023-09-12: patched
- 2023-09-12: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-09-12: exploited: Reported as exploited in the wild at time of publication.