How severe is CVE-2026-22542?

CVE-2026-22542 has a CVSS 4.0 base score of 9.2, rated critical severity.

Is CVE-2026-22542 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-22542?

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.

Does CVE-2026-22542 have an EU (EUVD) identifier?

Yes. CVE-2026-22542 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1211.

When was CVE-2026-22542 published?

CVE-2026-22542 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2026-22542

CVE-2026-22542 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.2. 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-400.

Key facts

Severity: Critical (CVSS 4.0 base score 9.2)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1211
Weakness: CWE-400
Published: 2026-01-07
Last modified: 2026-06-17

Description

An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service.

Frequently asked questions

What is CVE-2026-22542?: An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service.
How severe is CVE-2026-22542?: CVE-2026-22542 has a CVSS 4.0 base score of 9.2, rated critical severity.
Is CVE-2026-22542 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-22542?: 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.
Does CVE-2026-22542 have an EU (EUVD) identifier?: Yes. CVE-2026-22542 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1211.
When was CVE-2026-22542 published?: CVE-2026-22542 was published on 2026-01-07 and last updated on 2026-06-17.

References

https://cds.thalesgroup.com/en

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