{
    "id": "CVE-2021-22681",
    "published": "2021-03-03 18:15:14",
    "last_modified": "2026-06-17 03:37:34",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-522",
    "description": "Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.",
    "epss_score": "0.63630",
    "epss_percentile": "0.99191",
    "kev": 1,
    "kev_due": "2026-03-26",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:27:09",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-03-26."
    },
    "products": [
        {
            "vendor": "rockwellautomation",
            "product": "compact_guardlogix_5370"
        },
        {
            "vendor": "rockwellautomation",
            "product": "compact_guardlogix_5380"
        },
        {
            "vendor": "rockwellautomation",
            "product": "compactlogix_1768"
        },
        {
            "vendor": "rockwellautomation",
            "product": "compactlogix_1769"
        },
        {
            "vendor": "rockwellautomation",
            "product": "compactlogix_5370"
        },
        {
            "vendor": "rockwellautomation",
            "product": "compactlogix_5380"
        },
        {
            "vendor": "rockwellautomation",
            "product": "compactlogix_5480"
        },
        {
            "vendor": "rockwellautomation",
            "product": "controllogix_5550"
        },
        {
            "vendor": "rockwellautomation",
            "product": "controllogix_5560"
        },
        {
            "vendor": "rockwellautomation",
            "product": "controllogix_5570"
        },
        {
            "vendor": "rockwellautomation",
            "product": "controllogix_5580"
        },
        {
            "vendor": "rockwellautomation",
            "product": "drivelogix_1794-l34"
        },
        {
            "vendor": "rockwellautomation",
            "product": "drivelogix_5560"
        },
        {
            "vendor": "rockwellautomation",
            "product": "drivelogix_5730"
        },
        {
            "vendor": "rockwellautomation",
            "product": "factorytalk_services_platform"
        },
        {
            "vendor": "rockwellautomation",
            "product": "guardlogix_5570"
        },
        {
            "vendor": "rockwellautomation",
            "product": "guardlogix_5580"
        },
        {
            "vendor": "rockwellautomation",
            "product": "rslogix_5000"
        },
        {
            "vendor": "rockwellautomation",
            "product": "softlogix_5800"
        },
        {
            "vendor": "rockwellautomation",
            "product": "studio_5000_logix_designer"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-22681",
        "date_added": "2026-03-05",
        "due_date": "2026-03-26",
        "vendor": "Rockwell",
        "product": "Multiple Products",
        "name": "Rockwell Multiple Products Insufficient Protected Credentials Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03",
        "https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22681"
    ]
}