How severe is CVE-2025-14942?

CVE-2025-14942 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-14942 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14942?

CVE-2025-14942 affects Wolfssh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-14942?

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-2025-14942 have an EU (EUVD) identifier?

Yes. CVE-2025-14942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0990.

When was CVE-2025-14942 published?

CVE-2025-14942 was published on 2026-01-06 and last updated on 2026-06-17.

CVE-2025-14942

CVE-2025-14942 is a critical-severity vulnerability in Wolfssh with a CVSS 3.x base score of 9.8. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.4
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-0990
Weakness: CWE-287
Affected product: Wolfssh
Published: 2026-01-06
Last modified: 2026-06-17

Description

wolfSSH’s key exchange state machine can be manipulated to leak the client’s password in the clear, trick the client to send a bogus signature, or trick the client into skipping user authentication. This affects client applications with wolfSSH version 1.4.21 and earlier. Users of wolfSSH must update or apply the fix patch and it’s recommended to update credentials used. This fix is also recommended for wolfSSH server applications. While there aren’t any specific attacks on server applications, the same defect is present. Thanks to Aina Toky Rasoamanana of Valeo and Olivier Levillain of Telecom SudParis for the report.

Frequently asked questions

What is CVE-2025-14942?: wolfSSH’s key exchange state machine can be manipulated to leak the client’s password in the clear, trick the client to send a bogus signature, or trick the client into skipping user authentication. This affects client applications with wolfSSH version 1.4.21 and earlier. Users of wolfSSH must update or apply the fix patch and it’s recommended to update credentials used. This fix is also recommended for wolfSSH server applications. While there aren’t any specific attacks on server applications, the same defect is present. Thanks to Aina Toky Rasoamanana of Valeo and Olivier Levillain of Telecom SudParis for the report.
How severe is CVE-2025-14942?: CVE-2025-14942 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-14942 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14942?: CVE-2025-14942 affects Wolfssh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-14942?: 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-2025-14942 have an EU (EUVD) identifier?: Yes. CVE-2025-14942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0990.
When was CVE-2025-14942 published?: CVE-2025-14942 was published on 2026-01-06 and last updated on 2026-06-17.

References

https://github.com/wolfSSL/wolfssh/pull/855

Affected products (1)

cpe:2.3:a:wolfssh:wolfssh:*:*:*:*:*:*:*:*

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