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Home / CVE DB / CVE-2025-61984
Standard
Vulnerability Identifier

CVE-2025-61984

2025-10-06
Severity Assessment
3.6
LOW
CVSS v3.x Score
Clinical Analysis (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.)

Vector Sequencing

Attack Parameters

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Impact Consequences

Technical Impact

Unchanged
Scope
Low
Confidentiality
Low
Integrity
None
Availability
AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness Classification

CWE-CWE-159

View CWE Details ↗
Timeline

Time Line

PUBLICATION
06 Oct 2025
MODIFICATION
11 Nov 2025
FIRST PATCH
21 Apr 2026
Impact Statistics

Key Metrics

CVSS Score
3.6
LOW
Patches
5
Available
Remediation Protocol

Recommended Solution

No automatic solution found. Check vendor references.
Patch Library
Oracle Critical Patch Update Advisory - April 2026
DL
USN-8090-2: OpenSSH vulnerabilities
DL
USN-8090-1: OpenSSH vulnerabilities
DL
CVE-2025-61984: 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.)
DL
CVE-2025-61984
DL
Recommended Actions for Administrators

Immediate Action Plan

1. Inventory

Identify all affected systems in your infrastructure.

2. Assessment

Assess exposure and criticality for your organization.

3. Mitigation

Apply patches or available workarounds.

4. Verification

Test and confirm effectiveness of applied measures.

Sources & Bibliography
NIST NVD MITRE CVE External Reference ↗ External Reference ↗ External Reference ↗ External Reference ↗ External Reference ↗