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CVE-2025-14821

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

Published: 4/7/2026 Last updated: 4/28/2026 Reserved: 12/17/2025

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 7.8 High CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Opam packages affected (1)

libssh

Products affected (14)

Product Vendor Version
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 10 Red Hat openssl-1.0.2
Red Hat Enterprise Linux 10 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat openssl-1.0.2c
Red Hat Enterprise Linux 9 Red Hat openssl-1.0.2d
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 6 Red Hat openssl-1.0.2a
Red Hat Enterprise Linux 7 Red Hat openssl-1.0.2b
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Hardened Images Red Hat openssl-1.1.0c
Red Hat Hardened Images Red Hat n/a
Red Hat OpenShift Container Platform 4 Red Hat openssl-1.0.2e
Red Hat OpenShift Container Platform 4 Red Hat n/a

References (8)

Credits (2)