ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-23390

Fleet doesn’t validate a server’s certificate when connecting through SSH

Published Oct 15, 2026 · catalog updated Oct 15, 2026 · SUSE

Check if you run it

No confirmed exploitation is on record for CVE-2025-23390. EPSS is 0.19%. Act only if a listed version of SUSE is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.19%
Remediation
Advisory link
Affected products
vendor SUSE fleet

A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet. In case the server that is being connected to has a trusted entry in the known_hosts file, then Fleet will correctly check the authenticity of the presented certificate.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor SUSE fleetversion unspecified

How to fix CVE-2025-23390

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-23390. EPSS is 0.19%. Act only if a listed version of SUSE is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-295: Improper Certificate Validation. EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · NIST NVD

    Detected

    A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet. In case the server that is being connected to has a trusted entry in the known_hosts file, then Fleet will correctly c

  2. Oct 15, 2026 · NIST NVD

    Updated

    A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet. In case the server that is being connected to has a trusted entry in the known_hosts file, then Fleet will correctly c

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2025-23390

    A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2025-23390

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-23390

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2025-23390

    A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the file. This could allow the execution of a man-in-the-middle (MitM) attack

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.