CVE-2023-36802

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.279 · 98 %ileexploit · PoCDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 6 exploits · PoC

Likely / severe?

27.9% (98th) EPSS

CVSS 7.8 · high

Is it mine?

74 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2023-09-12remediate by 2023-10-03

required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-26

Microsoft Streaming Service Proxy Privilege Escalation Vulnerability

Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.4851:Security Update:https://support.microsoft.com/help/5030214
https://support.microsoft.com/help/5030214
FixedWindows 10 Version 1809 for ARM64-based Systemsmsrc_csaf
10.0.17763.4851:Security Update:https://support.microsoft.com/help/5030214
https://support.microsoft.com/help/5030214
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.4851:Security Update:https://support.microsoft.com/help/5030214
https://support.microsoft.com/help/5030214
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.3448:Security Update:https://support.microsoft.com/help/5030211
https://support.microsoft.com/help/5030211
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.3448:Security Update:https://support.microsoft.com/help/5030211
https://support.microsoft.com/help/5030211
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.3448:Security Update:https://support.microsoft.com/help/5030211
https://support.microsoft.com/help/5030211
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.3448:Security Update:https://support.microsoft.com/help/5030211
https://support.microsoft.com/help/5030211
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.3448:Security Update:https://support.microsoft.com/help/5030211
https://support.microsoft.com/help/5030211
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.3448:Security Update:https://support.microsoft.com/help/5030211
https://support.microsoft.com/help/5030211
FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.2283:Security Update:https://support.microsoft.com/help/5030219
https://support.microsoft.com/help/5030219
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.2283:Security Update:https://support.microsoft.com/help/5030219
https://support.microsoft.com/help/5030219
FixedWindows 11 version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.22000.2416:Security Update:https://support.microsoft.com/help/5030217
https://support.microsoft.com/help/5030217
FixedWindows 11 version 21H2 for x64-based Systemsmsrc_csaf
10.0.22000.2416:Security Update:https://support.microsoft.com/help/5030217
https://support.microsoft.com/help/5030217
FixedWindows Server 2019msrc_csaf
10.0.17763.4851:Security Update:https://support.microsoft.com/help/5030214
https://support.microsoft.com/help/5030214
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.4851:Security Update:https://support.microsoft.com/help/5030214
https://support.microsoft.com/help/5030214
FixedWindows Server 2022msrc_csaf
10.0.20348.1970:Security Update:https://support.microsoft.com/help/5030216
https://support.microsoft.com/help/5030216
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.1970:Security Update:https://support.microsoft.com/help/5030216
https://support.microsoft.com/help/5030216

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USprimaryCWE-119USCWE-416US

exploits (6)

Public proof-of-concept and weaponised exploit code.

4zur-0312/CVE-2023-36802CVE-2023-36802 ITW casePoC · poc_in_github
Nero22k/cve-2023-36802Exploit for CVE-2023-36802 targeting MSKSSRV.SYS driverPoC · poc_in_github
chompie1337/Windows_MSKSSRV_LPE_CVE-2023-36802LPE exploit for CVE-2023-36802PoC · poc_in_github
nhh9905/CVE-2023-36802Old CVE, but new way to leak everything.PoC · poc_in_github
rahul0xkr/Reproducing-CVE-2023-36802Reverse engineering and vulnerability research on CVE-2023-36802, focusing on object type confusion in mksssrv.sys.PoC · poc_in_github
x0rb3l/CVE-2023-36802-MSKSSRV-LPEPoC for CVE-2023-36802 Microsoft Kernel Streaming Service ProxyPoC · poc_in_github

affected products (74)

Products and version ranges known to be affected.

Hitachi Storageall versionscert_bundDEcpe:/h:hitachi:storage:-
Microsoft Windows 10all versionscert_bundDEcpe:/o:microsoft:windows_10:-
Microsoft Windows 10 Version 1607all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1607
Microsoft Windows 10 Version 1809all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1809
Microsoft Windows 10 Version 21H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_21h2
Microsoft Windows 10 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_22h2
Microsoft Windows 11 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_22h2
Microsoft Windows 11 version 21H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_21h2
Microsoft Windows Server 2008 R2 SP1all versionscert_bundDEcpe:/o:microsoft:windows_server:2008_r2_sp1
Microsoft Windows Server 2008 SP2all versionscert_bundDEcpe:/o:microsoft:windows_server:2008_sp2
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-
Microsoft Windows Server 2016all versionscert_bundDEcpe:/o:microsoft:windows_server_2016:-
Microsoft Windows Server 2019all versionscert_bundDEcpe:/o:microsoft:windows_server_2019:-
Microsoft Windows Server 2022all versionscert_bundDEcpe:/o:microsoft:windows_server_2022:-
Microsoft Windows 10 Version 180910.0.0 → 10.0.17763.4851enisa_euvdEU
Microsoft Windows 10 Version 180910.0.17763.0 → 10.0.17763.4851enisa_euvdEU
Microsoft Windows 10 Version 21H210.0.19043.0 → 10.0.19044.3448enisa_euvdEU
Microsoft Windows 10 Version 22H210.0.19045.0 → 10.0.19045.3448enisa_euvdEU
Microsoft Windows 11 version 21H210.0.0 → 10.0.22000.2416enisa_euvdEU

showing 20 of 74

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2328Microsoft Windows und Microsoft Windows Server: Mehrere SchwachstellenDeutsch2023-09-12csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in Microsoft Windows und Microsoft Windows Server ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand herbeizuführen und seine Rechte zu erweitern.
msrc_CVE-2023-36802Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability2023-09-12csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf NVD CVE.org MITRE

published 2023-09-12modified 2026-06-17

related (12,135)

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+12130 more

references (7)

External citations — patches, advisories, analysis.

scry

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