Vulnerability in Libssh
CVE-2025-14821
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (2.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:7067 (vendor-advisory, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2025-14821 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/ (Release Notes)
Frequently asked questions
- What is CVE-2025-14821?
- CVE-2025-14821 is a high-severity vulnerability in Libssh, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-04-07.
- How severe is CVE-2025-14821?
- High severity. CVSS v3 base score is 7.8 out of 10.