KEV Entry

CVE-2021-27964

Known Exploited Vulnerability Entry Previdian

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Entry Details
Confirmed Exploited

CVE-2021-27964

2025-06-05 02:00 CEST

Timestamps

2025-06-05

2025-06-05

Scope

SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to... | Affected: SonLogger / SonLogger | CVSS: 9.8 (CRITICAL) | EPSS: 0.47519 | Used in malware: unknown | Not yet in CISA KEV: True

References
  • {'id': 'CVE-2021-27964', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-27964'}
  • {'id': 'previdian', 'url': 'https://previdian.com/CVE-2021-27964'}

fc1bd62c-ce75-4a6d-b7f7-2ea2e10a2678

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

2026-10-02 09:09 CEST

2026-10-02 09:09 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report previdian successful_exploitation 0.70
View details 
{
  "added_date": "2025-06-05T00:00:00.000Z",
  "ahead_of_cisa_kev": null,
  "cve_id": "CVE-2021-27964",
  "cvss_estimated": false,
  "cvss_score": 9.8,
  "cvss_severity": "CRITICAL",
  "epss_percentile": 0.98809,
  "epss_score": 0.47519,
  "feed": "Previdian (previdian.com)",
  "ghsa_id": null,
  "not_yet_in_cisa_kev": true,
  "previous_ids": [],
  "product": "SonLogger",
  "title": "SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to...",
  "used_in_malware": "unknown",
  "vendor": "SonLogger",
  "virtual_patch": false,
  "vulnerability_id": "CVE-2021-27964"
}
 -
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