CVE-2023-29357

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-01-10), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed: 0

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

Microsoft SharePoint Server Elevation of Privilege Vulnerability

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

June 14, 2023

Last Modified

October 28, 2025

Advisory Details (2)

Auto-updated Sep 17, 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-2023-29357
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-2023-29357

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 92× in last 7d / 387× 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 1,405 total refreshes for this CVE.

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

Publicly available exploits

(6 references)

Working exploit code is in the public domain (1 Metasploit module) (4 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCGuillaume-Risch/cve-2023-29357-Sharepoint
    First seen Dec 22, 2023
    Open source ↗
  • GitHub PoCKeyStrOke95/CVE-2023-29357-ExE
    First seen Oct 10, 2023

    Recreation of the SharePoint PoC for CVE-2023-29357 in C# from LuemmelSec

    Open source ↗
  • GitHub PoCLuemmelSec/CVE-2023-29357
    First seen Sep 30, 2023
    Open source ↗
  • GitHub PoCChocapikk/CVE-2023-29357
    First seen Sep 26, 2023

    Microsoft SharePoint Server Elevation of Privilege Vulnerability

    Open source ↗
  • Metasploitexploit/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rce✓ verified
    First seen May 1, 2023

    Sharepoint Dynamic Proxy Generator Unauth RCE

    Open source ↗
  • Nucleihttp/cves/2023/CVE-2023-29357.yaml
    First seen Jan 1, 2023

    Microsoft SharePoint - Authentication Bypass

    Open source ↗

Frequently asked(6)

What is CVE-2023-29357?
CVE-2023-29357 is a critical vulnerability published on June 14, 2023. Microsoft SharePoint Server Elevation of Privilege Vulnerability
When was CVE-2023-29357 disclosed?
CVE-2023-29357 was first published in the National Vulnerability Database on June 14, 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-2023-29357 actively exploited?
Yes. CISA added CVE-2023-29357 to the Known Exploited Vulnerabilities catalog on January 10, 2024, affecting Microsoft SharePoint Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-29357?
CVE-2023-29357 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-29357?
CVE-2023-29357 affects Microsoft SharePoint Server. 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-2023-29357?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-29357, 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-2023-29357

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