How severe is CVE-2026-9140?

CVE-2026-9140 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2026-9140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9140?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-9140 published?

CVE-2026-9140 was published on 2026-07-14.

CVE-2026-9140

CVE-2026-9140 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. 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-770.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Published: 2026-07-14
Last modified: 2026-07-14

Description

A denial-of-service security issue exists in the 1719-AENTR. The security issue stems from improper handling of a UDP unicast network storm, which causes the device to become overloaded and lose communication. A power cycle is required to recover.

Frequently asked questions

What is CVE-2026-9140?: A denial-of-service security issue exists in the 1719-AENTR. The security issue stems from improper handling of a UDP unicast network storm, which causes the device to become overloaded and lose communication. A power cycle is required to recover.
How severe is CVE-2026-9140?: CVE-2026-9140 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2026-9140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9140?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-9140 published?: CVE-2026-9140 was published on 2026-07-14.

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1778.html

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