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KEV Entry

CVE-2021-42237

Known Exploited Vulnerability Entry Shadowserver

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Entry Details
Confirmed Exploited

CVE-2021-42237

2026-09-06 00:00 UTC

Characteristics

98.0

Timestamps

2023-10-14

2023-10-14

2026-09-06

Scope

Affected: Sitecore / Sitecore XP | Class: cms | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-09-06: 39

References
  • {'id': 'CVE-2021-42237', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-42237'}
  • {'id': 'shadowserver', 'url': 'https://www.shadowserver.org/what-we-do/network-reporting/honeypot-exploited-vulnerabilities-report/'}

80ef334d-0a4e-44c4-9227-ff326d5b121f

Shadowserver
c8fb6bf1-f81f-4cb8-95b1-eadbb3b54ee8

2026-07-01 05:54 UTC

2026-09-08 01:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
honeypot shadowserver in_the_wild_attempts 0.70
View details 
{
  "1d": "3",
  "30d_avg": 1,
  "7d_avg": 2,
  "90d_avg": 1,
  "cisa_kev": "yes",
  "class": "cms",
  "connections": 39,
  "feed": "Shadowserver Foundation honeypot/exploited-vulnerabilities",
  "iot": "no",
  "observation_date": "2026-09-06",
  "product": "Sitecore XP",
  "type": "http-scan",
  "vendor": "Sitecore",
  "vulnerability_class": "CVSS",
  "vulnerability_score": 9.8,
  "vulnerability_severity": "Critical"
}
 -
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