Vulnerability-Lookup

GHSA-FVQ9-7G3P-R5G2

Vulnerability from github – Published: 2026-07-14 18:31 – Updated: 2026-07-14 18:31

Details

A security issue exists within CompactLogix® 5380, ControlLogix® 5580, and EN4 communication modules related to CIP Security certificate revocation handling. The security issue stems from the controller failing to properly reject certificates signed by an intermediate certificate that has been revoked via a Certificate Revocation List (CRL). This could allow a network-based attacker to establish a connection using a certificate that should be untrusted, potentially bypassing CIP Security protections.

Severity

8.2 (High)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-9636"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-299"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-14T16:17:05Z",
    "severity": "HIGH"
  },
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  "id": "GHSA-fvq9-7g3p-r5g2",
  "modified": "2026-07-14T18:31:56Z",
  "published": "2026-07-14T18:31:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9636"
    },
    {
      "type": "WEB",
      "url": "https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1788.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-9636 (GCVE-0-2026-9636)

Vulnerability from cvelistv5 – Published: 2026-07-14 15:11 – Updated: 2026-07-14 15:55

Title

Rockwell Automation CompactLogix® 5380 ControlLogix® 5580 / 1756-EN4 Communications Module – Certificate Revocation List Vulnerability

Summary

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-299 - Improper check for certificate revocation

Assigner

Rockwell

References

1 reference

URL	Tags
https://www.rockwellautomation.com/en-us/trust-ce…

Impacted products

1 product

Vendor	Product	Version
Rockwell Automation	ControlLogix® 5580, CompactLogix® 5380, GuardLogix® 5580, Compact GuardLogix® 5380, 1756-EN4TR	Affected: Version 36 - Version 37

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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-9636",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-14T15:54:57.625184Z",
                "version": "2.0.3"
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        "discovery": "INTERNAL"
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      "title": "Rockwell Automation CompactLogix\u00ae 5380 ControlLogix\u00ae 5580 / 1756-EN4 Communications Module \u2013 Certificate Revocation List Vulnerability",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-FVQ9-7G3P-R5G2

CVE-2026-9636 (GCVE-0-2026-9636)

Tags

Sightings

Nomenclature