What’s Vulnerable › Vulnerabilities

CVE-2025-14821: Libssh: libssh: insecure default configuration leads to local man-in-the-middle attacks on windows

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-07 · updated 2026-10-14
• Weakness: CWE-427

Description

A flaw was found in libssh. This vulnerability allows local man-in-the-middle attacks, security downgrades of SSH (Secure Shell) connections, and manipulation of trusted host information, posing a significant risk to the confidentiality, integrity, and availability of SSH communications via an insecure default configuration on Windows systems where the library automatically loads configuration files from the C:\etc directory, which can be created and modified by unprivileged local users.

Affected products

• libssh: before 0.12.0 — fixed in 0.12.0
• RedHat Hardened Images: all versions

How to fix

Upgrade to a fixed version: libssh 0.12.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:7067
• https://access.redhat.com/security/cve/CVE-2025-14821
• https://bugzilla.redhat.com/show_bug.cgi?id=2423148
• https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/

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