KEV Entry

CVE-2021-21972

Known Exploited Vulnerability Entry External Catalog

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Entry Details
Confirmed Exploited

CVE-2021-21972

2026-05-15 00:00 UTC

Characteristics

98.0

Timestamps

2023-10-17

2023-10-17

2026-05-15

Scope

Affected: VMWare / vCenter Server | Class: other-software | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-05-15: 5

References
  • {'id': 'CVE-2021-21972', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-21972'}
  • {'id': 'shadowserver', 'url': 'https://www.shadowserver.org/what-we-do/network-reporting/honeypot-exploited-vulnerabilities-report/'}

88e8e030-9001-4b8a-a1dd-55c1c4a602de

c8fb6bf1-f81f-4cb8-95b1-eadbb3b54ee8

2026-07-01 05:54 UTC

2026-07-01 12:44 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
honeypot shadowserver in_the_wild_attempts 0.70
View details 
{
  "1d": "1",
  "30d_avg": 0,
  "7d_avg": 0,
  "90d_avg": 0,
  "cisa_kev": "yes",
  "class": "other-software",
  "connections": 5,
  "feed": "Shadowserver Foundation honeypot/exploited-vulnerabilities",
  "iot": "no",
  "observation_date": "2026-05-15",
  "product": "vCenter Server",
  "type": "http-scan",
  "vendor": "VMWare",
  "vulnerability_class": "CVSS",
  "vulnerability_score": 9.8,
  "vulnerability_severity": "Critical"
}
 -
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