CVE-2023-36802

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-09-12), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 26%CVSS: 7.8Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability

CVSS v3
7.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
26%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

September 12, 2023

Last Modified

October 28, 2025

Advisory Details (2)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36802
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36802

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 95× in last 7d / 391× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 996 total refreshes for this CVE.

  1. 2026-08-11 05:47 UTCVendor advisory
  2. 2026-08-11 05:47 UTCGHSA enrichment
  3. 2026-08-11 01:59 UTCVendor advisory
  4. 2026-08-11 01:59 UTCGHSA enrichment
  5. 2026-08-10 22:12 UTCGHSA enrichment
  6. 2026-08-10 18:24 UTCGHSA enrichment
  7. 2026-08-10 14:36 UTCGHSA enrichment
  8. 2026-08-10 10:48 UTCGHSA enrichment
  9. 2026-08-10 07:00 UTCGHSA enrichment
  10. 2026-08-10 03:13 UTCVendor advisory
  11. 2026-08-10 03:13 UTCGHSA enrichment
  12. 2026-08-09 23:25 UTCGHSA enrichment
  13. 2026-08-09 19:38 UTCVendor advisory
  14. 2026-08-09 19:38 UTCGHSA enrichment
  15. 2026-08-09 15:50 UTCEG score recompute
  16. 2026-08-09 15:50 UTCGHSA enrichment
  17. 2026-08-09 13:44 UTCEPSS rescore
  18. 2026-08-09 12:03 UTCVendor advisory
  19. 2026-08-09 12:03 UTCGHSA enrichment
  20. 2026-08-09 08:15 UTCGHSA enrichment
  21. 2026-08-09 04:27 UTCVendor advisory
  22. 2026-08-09 04:27 UTCGHSA enrichment
  23. 2026-08-09 00:40 UTCVendor advisory
  24. 2026-08-09 00:40 UTCGHSA enrichment
  25. 2026-08-08 20:52 UTCVendor advisory
Show 75 more
  1. 2026-08-08 20:52 UTCGHSA enrichment
  2. 2026-08-08 17:04 UTCEG score recompute
  3. 2026-08-08 17:04 UTCVendor advisory
  4. 2026-08-08 17:04 UTCGHSA enrichment
  5. 2026-08-08 16:34 UTCEPSS rescore
  6. 2026-08-08 13:16 UTCVendor advisory
  7. 2026-08-08 13:16 UTCGHSA enrichment
  8. 2026-08-08 09:28 UTCVendor advisory
  9. 2026-08-08 09:28 UTCGHSA enrichment
  10. 2026-08-08 05:40 UTCGHSA enrichment
  11. 2026-08-08 01:53 UTCVendor advisory
  12. 2026-08-08 01:53 UTCGHSA enrichment
  13. 2026-08-07 22:05 UTCGHSA enrichment
  14. 2026-08-07 18:18 UTCEG score recompute
  15. 2026-08-07 18:18 UTCVendor advisory
  16. 2026-08-07 18:18 UTCGHSA enrichment
  17. 2026-08-07 17:09 UTCCISA KEV update
  18. 2026-08-07 16:24 UTCEPSS rescore
  19. 2026-08-07 14:30 UTCVendor advisory
  20. 2026-08-07 14:30 UTCGHSA enrichment
  21. 2026-08-07 10:43 UTCVendor advisory
  22. 2026-08-07 10:43 UTCGHSA enrichment
  23. 2026-08-07 06:55 UTCVendor advisory
  24. 2026-08-07 06:55 UTCGHSA enrichment
  25. 2026-08-07 03:07 UTCVendor advisory
  26. 2026-08-07 03:07 UTCGHSA enrichment
  27. 2026-08-06 23:19 UTCVendor advisory
  28. 2026-08-06 23:19 UTCGHSA enrichment
  29. 2026-08-06 19:31 UTCVendor advisory
  30. 2026-08-06 19:31 UTCGHSA enrichment
  31. 2026-08-06 15:44 UTCEG score recompute
  32. 2026-08-06 15:44 UTCVendor advisory
  33. 2026-08-06 15:44 UTCGHSA enrichment
  34. 2026-08-06 13:44 UTCEPSS rescore
  35. 2026-08-06 11:56 UTCVendor advisory
  36. 2026-08-06 11:56 UTCGHSA enrichment
  37. 2026-08-06 08:08 UTCVendor advisory
  38. 2026-08-06 08:08 UTCGHSA enrichment
  39. 2026-08-06 04:21 UTCVendor advisory
  40. 2026-08-06 04:21 UTCGHSA enrichment
  41. 2026-08-06 00:33 UTCVendor advisory
  42. 2026-08-06 00:33 UTCGHSA enrichment
  43. 2026-08-05 20:46 UTCEG score recompute
  44. 2026-08-05 20:46 UTCVendor advisory
  45. 2026-08-05 20:46 UTCGHSA enrichment
  46. 2026-08-05 19:15 UTCEPSS rescore
  47. 2026-08-05 19:15 UTCEPSS rescore
  48. 2026-08-05 17:25 UTCCISA KEV update
  49. 2026-08-05 16:58 UTCGHSA enrichment
  50. 2026-08-05 13:10 UTCVendor advisory
  51. 2026-08-05 13:10 UTCGHSA enrichment
  52. 2026-08-05 09:22 UTCVendor advisory
  53. 2026-08-05 09:22 UTCGHSA enrichment
  54. 2026-08-05 05:34 UTCVendor advisory
  55. 2026-08-05 05:34 UTCGHSA enrichment
  56. 2026-08-05 01:45 UTCVendor advisory
  57. 2026-08-05 01:45 UTCGHSA enrichment
  58. 2026-08-04 21:58 UTCVendor advisory
  59. 2026-08-04 21:58 UTCGHSA enrichment
  60. 2026-08-04 18:10 UTCEG score recompute
  61. 2026-08-04 18:10 UTCVendor advisory
  62. 2026-08-04 18:10 UTCGHSA enrichment
  63. 2026-08-04 17:02 UTCCISA KEV update
  64. 2026-08-04 15:07 UTCEPSS rescore
  65. 2026-08-04 14:22 UTCEG score recompute
  66. 2026-08-04 14:22 UTCVendor advisory
  67. 2026-08-04 14:22 UTCGHSA enrichment
  68. 2026-08-04 10:35 UTCEPSS rescore
  69. 2026-08-04 10:34 UTCVendor advisory
  70. 2026-08-04 10:33 UTCGHSA enrichment
  71. 2026-08-04 06:42 UTCVendor advisory
  72. 2026-08-04 06:42 UTCGHSA enrichment
  73. 2026-08-04 02:51 UTCVendor advisory
  74. 2026-08-04 02:51 UTCGHSA enrichment
  75. 2026-08-03 23:04 UTCGHSA enrichment

Publicly available exploits

(4 references)

Working exploit code is in the public domain (4 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCNero22k/cve-2023-36802
    First seen Oct 23, 2023

    Exploit for CVE-2023-36802 targeting MSKSSRV.SYS driver

    Open source ↗
  • GitHub PoCx0rb3l/CVE-2023-36802-MSKSSRV-LPE
    First seen Oct 20, 2023

    PoC for CVE-2023-36802 Microsoft Kernel Streaming Service Proxy

    Open source ↗
  • GitHub PoC4zur-0312/CVE-2023-36802
    First seen Oct 19, 2023

    CVE-2023-36802 ITW case

    Open source ↗
  • GitHub PoCchompie1337/Windows_MSKSSRV_LPE_CVE-2023-36802
    First seen Oct 9, 2023

    LPE exploit for CVE-2023-36802

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2023-36802?
CVE-2023-36802 is a critical vulnerability published on September 12, 2023. Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability
When was CVE-2023-36802 disclosed?
CVE-2023-36802 was first published in the National Vulnerability Database on September 12, 2023, with the most recent update on October 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-36802 actively exploited?
Yes. CISA added CVE-2023-36802 to the Known Exploited Vulnerabilities catalog on September 12, 2023, affecting Microsoft Streaming Service Proxy. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-36802?
CVE-2023-36802 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-36802?
CVE-2023-36802 affects Microsoft Streaming Service Proxy. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2023-36802?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-36802, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-36802

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