CVE-2025-14821

Name: CVE-2025-14821
Creator: NVD / NIST
Published: 2026-04-07T17:16:25.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7/10EPSS 0.13%

Last modified Jun 25, 2026

CVE-2025-14821 is a high-severity vulnerability rated 7/10 on the CVSS scale. 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.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7/10

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

EPSS Probability

0.13%

2.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-427

Affected Software

Vendor	Product	Versions
Libssh	Libssh	< 0.12.0
Redhat	Hardened Images	All versions

References

https://access.redhat.com/errata/RHSA-2026:7067Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-14821Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2423148Issue Tracking, Third Party Advisory
https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/Release Notes

Timeline

Published: Apr 7, 2026
Last Modified: Jun 25, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-14821?

How severe is CVE-2025-14821?

CVE-2025-14821 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.

How do I fix CVE-2025-14821?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-14821?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST