High severity · published Apr 7, 2026
CVE-2025-14821
Libssh: libssh: insecure default configuration leads to local man-in-the-middle attacks on windows
7.0
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
HI
Hardened Images · Redhat
All versions, or not specified · source: NVD
LI
Libssh · Libssh
before 0.12.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-14821
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-14821
Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:7067
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-14821
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2423148
Release Notes
https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/
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