CVEs / CVE-2023-36802

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

Known exploited in the CISA KEV catalog since 12 Sep 2023
high 7.8 CVSS 3.1 (from the CNA)
EPSS 27.9% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

Microsoft Streaming Service Proxy contains an unspecified vulnerability that allows for privilege escalation.
CISA, Known Exploited Vulnerabilities catalog

Description

Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability
The CVE record, via NVD · published 12 Sep 2023 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Microsoft Windows 10 Version 1809	from 10.0.17763.0, before 10.0.17763.4851	10.0.17763.4851
Microsoft Windows 10 Version 1809	from 10.0.0, before 10.0.17763.4851	10.0.17763.4851
Microsoft Windows Server 2019	from 10.0.17763.0, before 10.0.17763.4851	10.0.17763.4851
Microsoft Windows Server 2019 (Server Core installation)	from 10.0.17763.0, before 10.0.17763.4851	10.0.17763.4851
Microsoft Windows Server 2022	from 10.0.20348.0, before 10.0.20348.1970	10.0.20348.1970
Microsoft Windows 11 version 21H2	from 10.0.0, before 10.0.22000.2416	10.0.22000.2416
Microsoft Windows 10 Version 21H2	from 10.0.19043.0, before 10.0.19044.3448	10.0.19044.3448
Microsoft Windows 11 version 22H2	from 10.0.22621.0, before 10.0.22621.2283	10.0.22621.2283
Microsoft Windows 10 Version 22H2	from 10.0.19045.0, before 10.0.19045.3448	10.0.19045.3448

Exploitation

In CISA KEV since	12 Sep 2023
Due date for US federal agencies	3 Oct 2023
Used in ransomware campaigns	Unknown
Required action	Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Severity

CVSS 3.1	7.8 high `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` Scored by the CNA ([email protected])
Weakness	CWE-416

References

CVE-2023-36802 on NVD
CVE-2023-36802 in the CISA KEV catalog
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36802 (cited by CISA)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36802 Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36802 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.