KEV Entry

CVE-2021-22681

Known Exploited Vulnerability Entry Previdian

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Entry Details
Confirmed Exploited

CVE-2021-22681

2026-06-01 13:38 CEST

Timestamps

2026-06-01

2026-06-01

Scope

Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers... | Affected: Rockwell Automation / Studio 5000 Logix Designer, RSLogix 5000 | CVSS: 9.8 (CRITICAL) | EPSS: 0.6363 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False

References
  • {'id': 'CVE-2021-22681', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-22681'}
  • {'id': 'GHSA-PVH9-P4PW-H78Q', 'url': 'https://github.com/advisories/GHSA-PVH9-P4PW-H78Q'}
  • {'id': 'previdian', 'url': 'https://previdian.com/CVE-2021-22681'}

8916bdda-d2c9-4827-9ad0-ec2fdf665122

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": "2026-06-01T11:38:00.140Z",
  "ahead_of_cisa_kev": {
    "count": 1,
    "unit": "day"
  },
  "cve_id": "CVE-2021-22681",
  "cvss_estimated": false,
  "cvss_score": 9.8,
  "cvss_severity": "CRITICAL",
  "epss_percentile": 0.99194,
  "epss_score": 0.6363,
  "feed": "Previdian (previdian.com)",
  "ghsa_id": "GHSA-PVH9-P4PW-H78Q",
  "not_yet_in_cisa_kev": false,
  "previous_ids": [],
  "product": "Studio 5000 Logix Designer, RSLogix 5000",
  "title": "Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers...",
  "used_in_malware": "unknown",
  "vendor": "Rockwell Automation",
  "virtual_patch": false,
  "vulnerability_id": "CVE-2021-22681"
}
 -
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