CVE-2025-61984

LOW EPSS 12.5%
Published Oct 6, 20258mo ago · Modified Jun 17, 20262w ago
3.6 CVSS 3.1
Low
Find Similar
Published Oct 6, 2025 8mo ago
Last Modified Jun 17, 2026 2w ago

Description

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)

CVSS Details

Base Score
3.6
Exploitability
1.0
Impact
2.5
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
12.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-159

References 8

  • openwall.com http://www.openwall.com/lists/oss-security/2025/10/07/1
  • openwall.com http://www.openwall.com/lists/oss-security/2025/10/12/1
  • dgl.cx https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984
  • marc.info https://marc.info/?l=openssh-unix-dev&m=175974522032149&w=2
  • openssh.com https://www.openssh.com/releasenotes.html#10.1p1
  • openwall.com https://www.openwall.com/lists/oss-security/2025/10/06/1
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-61984-detection-script-remote-code-execution-vulnerability-affecting-openssh
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-61984-mitigation-script-remote-code-execution-vulnerability-affecting-openssh

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.