How severe is CVE-2026-9307?

CVE-2026-9307 has a CVSS 4.0 base score of 6.3, rated medium severity.

Is CVE-2026-9307 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9307?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-9307 have an EU (EUVD) identifier?

Yes. CVE-2026-9307 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37118.

When was CVE-2026-9307 published?

CVE-2026-9307 was published on 2026-06-16 and last updated on 2026-06-17.

CVE-2026-9307

CVE-2026-9307 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-497.

Key facts

Severity: Medium (CVSS 4.0 base score 6.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37118
Weakness: CWE-497
Published: 2026-06-16
Last modified: 2026-06-17

Description

A sensitive information disclosure security issue exists within the affected CompactLogix controllers. The controller's web server exposes CIP Connection IDs on the diagnostics webpage, which are accessible to any unauthenticated user on the network. This information can be leveraged by an attacker to construct malicious packets, leading to Denial-of-Service.

Frequently asked questions

What is CVE-2026-9307?: A sensitive information disclosure security issue exists within the affected CompactLogix controllers. The controller's web server exposes CIP Connection IDs on the diagnostics webpage, which are accessible to any unauthenticated user on the network. This information can be leveraged by an attacker to construct malicious packets, leading to Denial-of-Service.
How severe is CVE-2026-9307?: CVE-2026-9307 has a CVSS 4.0 base score of 6.3, rated medium severity.
Is CVE-2026-9307 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9307?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9307 have an EU (EUVD) identifier?: Yes. CVE-2026-9307 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37118.
When was CVE-2026-9307 published?: CVE-2026-9307 was published on 2026-06-16 and last updated on 2026-06-17.

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1776.html

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