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 — 5 sources updated this weekExploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 100%CVSS: 9.8Exploit: NoneExposed: 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. It is distinct from the 0–10 EG Score, which measures severity.

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
99.9%
KEV
⚠ Exploited

Published

June 14, 2023

Last Modified

October 28, 2025

Advisory Details (2)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa, microsoft.
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 97× in last 7d / 409× 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 695 total refreshes for this CVE.

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

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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