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.)
Published: 2025-10-06
Score: 3.6 Low
EPSS: < 1% Very Low
KEV: No
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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4584-1 openssh security update
Debian DSA Debian DSA DSA-6204-1 openssh security update
EUVD EUVD EUVD-2025-32589 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.)
Ubuntu USN Ubuntu USN USN-8090-1 OpenSSH vulnerabilities
Ubuntu USN Ubuntu USN USN-8090-2 OpenSSH vulnerabilities
History

Thu, 15 Oct 2026 04:30:00 +0200

Type Values Removed Values Added
References

Thu, 26 Feb 2026 19:30:00 +0100

Type Values Removed Values Added
CPEs cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*

Tue, 11 Nov 2025 16:30:00 +0100


Tue, 04 Nov 2025 23:30:00 +0100


Thu, 09 Oct 2025 14:15:00 +0200

Type Values Removed Values Added
Title openssh: From CVEorg collector
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 08 Oct 2025 15:45:00 +0200

Type Values Removed Values Added
First Time appeared Openbsd
Openbsd openssh
Vendors & Products Openbsd
Openbsd openssh

Tue, 07 Oct 2025 16:15:00 +0200

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 06 Oct 2025 21:15:00 +0200

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 06 Oct 2025 20:30:00 +0200

Type Values Removed Values Added
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.)
Weaknesses CWE-159
References
Metrics cvssV3_1

{'score': 3.6, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-15T01:09:29.598Z

Reserved: 2025-10-06T00:00:00.000Z

Link: CVE-2025-61984

cve-icon Vulnrichment

Updated: 2025-11-11T14:50:56.007Z

cve-icon NVD

Status : Deferred

Published: 2025-10-06T19:15:36.157

Modified: 2026-10-15T02:18:09.487

Link: CVE-2025-61984

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-06T00:00:00Z

Links: CVE-2025-61984 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-08T15:39:39Z

Weaknesses
  • CWE-159

    Improper Handling of Invalid Use of Special Elements