CVE-2023-36802: Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability

Overview

Severity
High (CVSS 7.8)
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Category
Elevation of Privilege
Exploit Status
Actively Exploited
Exploitation Likelihood
Detected
Patch Tuesday
2023-Sep
Released
2023-09-12
Last Updated
2023-09-19
EPSS Score
75.43% (percentile: 98.9%)
CISA KEV
Listed — due 2023-10-03

FAQ

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Known Exploits (5)

  • Microsoft Streaming Service Proxy Privilege Escalation Vulnerability — added 2025-09-26T15:51:33Z
  • Microsoft Streaming Service Proxy Privilege Escalation Vulnerability — added 2023-10-23T18:33:41Z
  • Microsoft Streaming Service Proxy Privilege Escalation Vulnerability — added 2023-10-20T02:05:27Z
  • Microsoft Streaming Service Proxy Privilege Escalation Vulnerability — added 2023-10-19T23:34:37Z
  • Microsoft Streaming Service Proxy Privilege Escalation Vulnerability — added 2023-10-09T17:32:15Z

Detection & Weaponization (1 sources)

Maturity: Exploit

  • GitHub PoC: 5 repositories

Affected Products (17)

Windows

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows 11 version 21H2 for x64-based Systems
  • Windows 11 version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems

Security Updates (6)

Acknowledgments

Microsoft Security Response Center, Microsoft Threat Intelligence, <a href="https://twitter.com/ze0rx">Guanghui Xia(@ze0r)</a> with Hebei HuaCe, <a href="https://twitter.com/chompie1337">Valentina Palmiotti</a> with IBM X-Force, Quan Jin(@jq0904) & ze0r with <a href="https://www.dbappsecurity.com.cn/product/cloud250.html">DBAPPSecurity WeBin Lab</a>

Revision History

  • 2023-09-12: Information published.
  • 2023-09-19: Added acknowledgements. This is an informational change only.