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5.3

Unsecured File Access via SSH Session Multiplexing

CVE-2025-54547 · published 1 year ago
Summary

A configuration issue on some systems allows SSH sessions to access files even after the session times out. This could lead to unauthorized access to sensitive data. To fix, ensure that the SSH session multiplexing feature is not enabled or use a session timeout of zero to prevent this issue.

Original advisory text
On affected platforms, if SSH session multiplexing was configured on the client side, SSH sessions (e.g, scp, sftp) multiplexed onto the same channel could perform file-system operations after a co...
On affected platforms, if SSH session multiplexing was configured on the client side, SSH sessions (e.g, scp, sftp) multiplexed onto the same channel could perform file-system operations after a configured session timeout expired
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-613Insufficient Session Expiration
Timeline
Published29 Oct 2025
Updated26 Oct 2026
First seen7 Mar 2026
Sources
CVE-2025-54547 · NVD
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