CVE-2025-63912
Published: 03 March 2026
Summary
CVE-2025-63912 is a high-severity Use of a Broken or Risky Cryptographic Algorithm (CWE-327) vulnerability in Cohesity Tranzman. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 1.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Contacts with security groups provide timely information on broken or risky cryptographic algorithms, reducing the likelihood of their selection and use.
Ongoing education and sharing of recommended practices helps organizations identify and migrate away from broken or risky cryptographic algorithms.
Cross-organization threat feeds commonly include advances in cryptanalysis and active exploits against weak or broken algorithms, allowing organizations to deprecate them proactively.
Capital planning and funding allow selection and ongoing support of strong cryptographic algorithms rather than weak or broken ones.
Risk updates surface newly-broken or risky cryptographic algorithms as threat intelligence and computing advances evolve, enabling timely replacement.
Scanners flag use of broken or weak cryptographic algorithms via known-vulnerability databases.
Enforces approved cryptographic algorithms for each use case, blocking use of broken or risky algorithms.
Flaw remediation replaces broken or risky cryptographic algorithms once safer implementations are released by vendors.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Weak crypto (CWE-327) in network-accessible appliance directly enables remote unauthenticated decryption of stored credentials (T1190 + T1552).
NVD Description
Cohesity TranZman Migration Appliance Release 4.0 Build 14614 was discovered to use a weak cryptography algorithm for data encryption, allowing attackers to trivially reverse the encyption and expose credentials.
Deeper analysisAI
CVE-2025-63912 is a vulnerability in the Cohesity TranZman Migration Appliance Release 4.0 Build 14614, where a weak cryptography algorithm (CWE-327) is used for data encryption. This flaw enables attackers to trivially reverse the encryption and expose credentials. The issue carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high confidentiality impact from network-based attacks.
Remote attackers require no privileges or user interaction to exploit this vulnerability. Successful exploitation allows them to decrypt protected data and retrieve sensitive credentials stored within the appliance.
Further details, including potential mitigation guidance, are available in the following references: https://gist.github.com/GregDurys/4c2765d76272cda64dfc78f7a75a9251 and https://github.com/GregDurys/Cohesity-TranZman-CVEs.
Details
- CWE(s)