KEV Entry

CVE-2026-55040

Known Exploited Vulnerability Entry KEVIntel

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Entry Details
Confirmed Exploited

CVE-2026-55040

2026-08-12 19:37 UTC

Timestamps

2026-08-12

2026-08-12

Scope

Microsoft SharePoint Server Security Feature Bypass Vulnerability | Affected: Microsoft / Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition | CVSS: 9.1 (CRITICAL) | EPSS: 0.01626 | Used in malware: unknown | Not yet in CISA KEV: True

References
  • {'id': 'CVE-2026-55040', 'url': 'https://www.cve.org/CVERecord?id=CVE-2026-55040'}
  • {'id': 'kevintel', 'url': 'https://kevintel.com/CVE-2026-55040'}

cbcb5f2d-24ef-44d7-82cc-1956de693ed4

KEVIntel
caeb2787-0d58-4236-9039-7c86c3e566f3

2026-08-12 20:00 UTC

2026-08-12 20:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report kevintel successful_exploitation 0.70
View details 
{
  "added_date": "2026-08-12T19:37:46.763Z",
  "ahead_of_cisa_kev": null,
  "cvss_score": 9.1,
  "cvss_severity": "CRITICAL",
  "epss_percentile": 0.73981,
  "epss_score": 0.01626,
  "feed": "KEVIntel (kevintel.com)",
  "not_yet_in_cisa_kev": true,
  "product": "Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition",
  "title": "Microsoft SharePoint Server Security Feature Bypass Vulnerability",
  "used_in_malware": "unknown",
  "vendor": "Microsoft"
}
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