CVE-2025-53770

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 2025-07-20), 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.

Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

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

July 20, 2025

Last Modified

August 4, 2026

Advisory Details (10)

Auto-updated Sep 15, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
generic🔴 Active Exploitation

Microsoft Rushes Emergency Fix for Exploited SharePoint Bug

https://www.darkreading.com/remote-workforce/microsoft-rushes-emergency-fix-exploited-sharepoint-toolshell-flaw
cisa Patch Available🔴 Active Exploitation

UPDATE: Microsoft Releases Guidance on Exploitation of SharePoint Vulnerabilities | CISA

UPDATE: Microsoft Releases Guidance on Exploitation of SharePoint Vulnerabilities | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770
generic Patch Available🔴 Active Exploitation

Microsoft SharePoint zero-day exploited in RCE attacks, no patch available

https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available/
generic

Warnings issued as hackers actively exploit critical zero-day in Microsoft SharePoint | The Record from Recorded Future News

https://therecord.media/microsoft-sharepoint-zero-day-vulnerability-exploited-globally
generic Patch Available🔴 Active Exploitation

SharePoint Under Siege: ToolShell Exploit (CVE-2025-49706 & CVE-2025-49704) - Eye Research

https://research.eye.security/sharepoint-under-siege/
generic

Global hack on Microsoft Sharepoint hits U.S., state agencies, researchers say | Hacker News

https://news.ycombinator.com/item?id=44629710
microsoft Patch Available

Blog MSRC | Microsoft Security Response Center

Blog MSRC | Microsoft Security Response Center. Patch available via Microsoft Security Update

Affected: Windows 11 apps_nav","ecn":"FooterNav_Whats_New_Footer_WhatsNew_Windows_11_apps_nav",

https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/
generic

GitHub - kaizensecurity/CVE-2025-53770: POC · GitHub

https://github.com/kaizensecurity/CVE-2025-53770
generic

SharePoint vulnerability with 9.8 severity rating under exploit across globe - Ars Technica

https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe/
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-2025-53770

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 86× in last 7d / 355× 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 1,322 total refreshes for this CVE.

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

Publicly available exploits

(10 references)

Working exploit code is in the public domain (9 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCsaladin0x1/CVE-2025-53770
    First seen Sep 4, 2025
    Open source ↗
  • Exploit-DBEDB-52405
    First seen Aug 11, 2025

    Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)

    Open source ↗
  • GitHub PoCImmersive-Labs-Sec/SharePoint-CVE-2025-53770-POC
    First seen Jul 29, 2025
    Open source ↗
  • GitHub PoC3a7/CVE-2025-53770
    First seen Jul 27, 2025

    CVE-2025-53770 Mass Scanner

    Open source ↗
  • GitHub PoCexfil0/CVE-2025-53770
    First seen Jul 23, 2025

    A sophisticated, wizard-driven Python exploit tool targeting CVE-2025-53770, a critical (CVSS 9.8) unauthenticated remote code execution (RCE) vulnerability in on-premises Microsoft SharePoint Server (2016, 2019, Subscription Edition)

    Open source ↗
  • GitHub PoCMuhammadWaseem29/CVE-2025-53770
    First seen Jul 22, 2025

    Unauthenticated Remote Code Execution via unsafe deserialization in Microsoft SharePoint Server (CVE-2025-53770)

    Open source ↗
  • GitHub PoCAdityaBhatt3010/CVE-2025-53770-SharePoint-Zero-Day-Variant-Exploited-for-Full-RCE
    First seen Jul 22, 2025

    A critical zero-auth RCE vulnerability in SharePoint (CVE-2025-53770), now exploited in the wild, building directly on the spoofing flaw CVE-2025-49706.

    Open source ↗
  • GitHub PoCkaizensecurity/CVE-2025-53770
    First seen Jul 21, 2025

    POC

    Open source ↗
  • GitHub PoCsoltanali0/CVE-2025-53770-Exploit
    First seen Jul 21, 2025

    SharePoint WebPart Injection Exploit Tool

    Open source ↗
  • GitHub PoChazcod/CVE-2025-53770
    First seen Jul 21, 2025

    Scanner for the SharePoint CVE-2025-53770 RCE zero day vulnerability.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2025-53770?
CVE-2025-53770 is a critical vulnerability published on July 20, 2025. Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this…
When was CVE-2025-53770 disclosed?
CVE-2025-53770 was first published in the National Vulnerability Database on July 20, 2025, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53770 actively exploited?
Yes. CISA added CVE-2025-53770 to the Known Exploited Vulnerabilities catalog on July 20, 2025, affecting Microsoft SharePoint. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2025-53770?
CVE-2025-53770 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2025-53770?
CVE-2025-53770 affects Microsoft SharePoint. 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-2025-53770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53770, 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-2025-53770

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