How severe is CVE-2026-0667?

CVE-2026-0667 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2026-0667 being actively exploited?

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

How do I fix CVE-2026-0667?

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

When was CVE-2026-0667 published?

CVE-2026-0667 was published on 2026-07-29 and last updated on 2026-07-30.

CVE-2026-0667

CVE-2026-0667 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-754.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-754
Published: 2026-07-29
Last modified: 2026-07-30

Description

CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability that could cause arbitrary code execution, denial of service and loss of confidentiality & integrity when communicating over the Modbus TCP protocol.

Frequently asked questions

What is CVE-2026-0667?: CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability that could cause arbitrary code execution, denial of service and loss of confidentiality & integrity when communicating over the Modbus TCP protocol.
How severe is CVE-2026-0667?: CVE-2026-0667 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2026-0667 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-0667?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-0667 published?: CVE-2026-0667 was published on 2026-07-29 and last updated on 2026-07-30.

References

https://download.se.com/files?p_Doc_Ref=SEVD-2026-041-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-041-01.pdf

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