CVE-2023-36802
HighExploitedPublic exploitMicrosoft Streaming Service Proxy Elevation of Privilege Vulnerability
Published Sep 12, 2023 · Updated Oct 30, 2025
Key Facts
Patch immediately- CVE-2023-36802 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 10 1809 (Microsoft), Windows 10 21h2 (Microsoft), Windows 10 22h2 (Microsoft) and 10 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 12, 2023. Public exploit code is available.
- EPSS estimates a 28% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows 10 1809 10.0.17763.4851, Windows 10 21h2 10.0.19044.3448, Windows 10 22h2 10.0.19045.3448.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
28%
Higher than 98.0% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-36802 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Sep 12, 2023 | Oct 3, 2023 | Not reported |
| Industry KEV feed | Sep 12, 2023 | Oct 3, 2023 | Not reported |
| CIRCL KEV | Sep 12, 2023 | Oct 3, 2023 | Not reported |
| ENISA EUVD | Sep 12, 2023 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
17 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1809Microsoft | See advisory | 10.0.17763.4851 |
| Windows 10 21h2Microsoft | See advisory | 10.0.19044.3448 |
| Windows 10 22h2Microsoft | See advisory | 10.0.19045.3448 |
| Windows 11 21h2Microsoft | See advisory | 10.0.22000.2416 |
| Windows 11 22h2Microsoft | See advisory | 10.0.22621.2275 |
Patched Releases
Windows 10 1809
10.0.17763.4851
Windows 10 21h2
10.0.19044.3448
Windows 10 22h2
10.0.19045.3448
Windows 11 21h2
10.0.22000.2416
Windows 11 22h2
10.0.22621.2275
Windows Server 2019
10.0.17763.4851
Windows Server 2022
10.0.20348.1970
Windows 10 Version 1809
10.0.17763.4851
Windows 10 Version 21H2
10.0.19044.3448
Windows 10 Version 22H2
10.0.19045.3448
Windows 11 version 21H2
10.0.22000.2416
Windows 11 version 22H2
10.0.22621.2283
Windows Server 2019 (Server Core installation)
10.0.17763.4851
Timeline
Publicly disclosed
Sep 12, 2023
Added to CISA KEV
Sep 12, 2023
Added to Industry KEV feed
Sep 12, 2023
Added to CIRCL KEV
Sep 12, 2023
Added to ENISA EUVD
Sep 12, 2023
Last updated
Oct 30, 2025
Weakness Type
- CWE-416 Use After Free
References
- patchMicrosoft Streaming Service Proxy Elevation of Privilege Vulnerability
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability
Affected: Windows 10 1809 (Microsoft); Windows 10 21h2 (Microsoft); Windows 10 22h2 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 12, 2023.
Yes. It was added on Sep 12, 2023 with a federal remediation due date of Oct 3, 2023.
Public exploit code is available.
Fixed versions are available, including Windows 10 1809 10.0.17763.4851, Windows 10 21h2 10.0.19044.3448, Windows 10 22h2 10.0.19045.3448.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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