What is the CVSS score of CVE-2025-63909?

CVE-2025-63909 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Tranzman are affected by CVE-2025-63909?

Cohesity TranZman Migration Appliance versions 4.0 Build 14614 contain a critical access control flaw that allows attackers to gain root-level privileges and manipulate arbitrary files on affected…

Is there a public PoC exploit available for CVE-2025-63909?

Yes, a public proof-of-concept exploit is available for CVE-2025-63909. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-63909?

Within 24 hours: Identify and inventory all Cohesity TranZman Migration Appliance instances running Build 14614, isolate them from production networks if possible, and restrict administrative access. Within 7 days: Implement network segmentation to limit lateral movement from affected appliances, enable enhanced logging and monitoring, and contact Cohesity support for patch availability and interim guidance. Within 30 days: Deploy patches immediately upon release or replace affected appliances with secure alternatives; conduct forensic review of logs for unauthorized access during the vulnerability window.

Tranzman CVE-2025-63909

HIGH

Improper Privilege Management (CWE-269)

2026-03-03 cve@mitre.org

Authentication Bypass Privilege Escalation Tranzman Cohesity

7.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.2 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

PoC Detected

Mar 05, 2026 - 00:35 vuln.today

Public exploit code

CVE Published

Mar 03, 2026 - 18:16 nvd

HIGH 7.2

DescriptionCVE.org

Incorrect access control in the component /opt/SRLtzm/bin/TapeDumper of Cohesity TranZman Migration Appliance Release 4.0 Build 14614 allows attackers to escalate privileges to root and read and write arbitrary files.

AnalysisAI

Technical ContextAI

Classified as CWE-269 (Improper Privilege Management). Affects the the component of Tranzman. Incorrect access control in the component /opt/SRLtzm/bin/TapeDumper of Cohesity TranZman Migration Appliance Release 4.0 Build 14614 allows attackers to escalate privileges to root and read and write arbitrary files.