What is the CVSS score of CVE-2025-14942?

CVE-2025-14942 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Wolfssh are affected by CVE-2025-14942?

CVE-2025-14942 presents critical security risk, a improper authentication vulnerability rated CVSS 9.8.

How to fix or mitigate CVE-2025-14942?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Audit authentication configurations and rotate any potentially compromised credentials.

Wolfssh CVE-2025-14942

CRITICAL

Improper Authentication (CWE-287)

2026-01-06 facts@wolfssl.com

Authentication Bypass Wolfssh

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 06, 2026 - 18:15 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

wolfSSH through 1.4.21 has a key exchange state machine vulnerability that can leak client passwords in cleartext, trick clients into sending bogus signatures, or skip user authentication entirely. A fundamental protocol implementation flaw.

Technical ContextAI

The SSH key exchange state machine does not properly enforce the expected sequence of protocol messages (CWE-287). An active man-in-the-middle attacker can manipulate the key exchange to: (1) receive the client's password before encryption is established, (2) trick the client into signing attacker-controlled data, or (3) convince the server that authentication was completed when it was not.

RemediationAI

Update wolfSSH immediately. Rotate all credentials used over wolfSSH connections. Consider using a different SSH library if updates cannot be applied quickly.