KEV Entry

CVE-2026-21666

Known Exploited Vulnerability Entry External Catalog

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Entry Details
Confirmed Exploited

CVE-2026-21666

2026-03-13 16:26 UTC

Timestamps

2026-03-13

2026-03-13

Scope

KEVIntel entry: A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server. | Affected: Veeam / Backup and Replication | CVSS: 10.0 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True

References
  • {'id': 'CVE-2026-21666', 'url': 'https://www.cve.org/CVERecord?id=CVE-2026-21666'}
  • {'id': 'kevintel', 'url': 'https://kevintel.com/vuln/CVE-2026-21666'}

5ecbb7d5-c47b-49e2-94db-dbe6c3bfbd81

caeb2787-0d58-4236-9039-7c86c3e566f3

2026-06-19 12:42 UTC

2026-06-19 12:42 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report kevintel successful_exploitation 0.70
View details 
{
  "added_date": "2026-03-13T16:26:50.000Z",
  "ahead_of_cisa_kev": null,
  "cvss_score": 10.0,
  "cvss_severity": "CRITICAL",
  "epss_percentile": null,
  "epss_score": null,
  "feed": "KEVIntel (kevintel.com)",
  "not_yet_in_cisa_kev": true,
  "product": "Backup and Replication",
  "title": "A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.",
  "used_in_malware": "unknown",
  "vendor": "Veeam"
}
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