What is the CVSS score of CVE-2025-70034?

CVE-2025-70034 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Ssh2 are affected by CVE-2025-70034?

CVE-2025-70034 affects the mscdex ssh2 library v1.17.0 and creates a denial-of-service risk through inefficient regex processing.

How to fix or mitigate CVE-2025-70034?

Within 24 hours: Identify all systems and applications using mscdex ssh2 v1.17.0 and assess exposure scope. Within 7 days: Implement network segmentation to restrict SSH access to trusted sources only and enable connection rate limiting on affected systems. Within 30 days: Upgrade to a patched version when available, or migrate to alternative SSH libraries with equivalent functionality.

Ssh2 CVE-2025-70034

HIGH

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2026-03-09 cve@mitre.org

Denial Of Service Ssh2

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Red Hat

6.5 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:56 vuln.today

CVE Published

Mar 09, 2026 - 18:16 nvd

HIGH 7.5

DescriptionCVE.org

An issue pertaining to CWE-1333: Inefficient Regular Expression Complexity (4.19) was discovered in mscdex ssh2 v1.17.0.

AnalysisAI

An issue pertaining to CWE-1333: Inefficient Regular Expression Complexity (4.19) was discovered in mscdex ssh2 v1.17.0. [CVSS 7.5 HIGH]

Technical ContextAI

Classified as CWE-1333 (Inefficient Regular Expression Complexity (ReDoS)). An issue pertaining to CWE-1333: Inefficient Regular Expression Complexity (4.19) was discovered in mscdex ssh2 v1.17.0.