How severe is CVE-2025-14821?

CVE-2025-14821 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-14821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14821?

CVE-2025-14821 primarily affects Redhat Hardened Images. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-14821?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-14821 have an EU (EUVD) identifier?

Yes. CVE-2025-14821 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209270.

When was CVE-2025-14821 published?

CVE-2025-14821 was published on 2026-04-07 and last updated on 2026-06-30.

CVE-2025-14821

CVE-2025-14821 is a high-severity vulnerability in Redhat Hardened Images with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209270
Weakness: CWE-427
Affected product: Redhat Hardened Images
Published: 2026-04-07
Last modified: 2026-06-30

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-14821?: CVE-2025-14821 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-14821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14821?: CVE-2025-14821 primarily affects Redhat Hardened Images. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-14821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-14821 have an EU (EUVD) identifier?: Yes. CVE-2025-14821 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209270.
When was CVE-2025-14821 published?: CVE-2025-14821 was published on 2026-04-07 and last updated on 2026-06-30.

References

Affected products (2)

cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*

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