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PatchSiren cyber security CVE debrief

CVE-2025-3928 Commvault CVE debrief

CVE-2025-3928 is an unspecified Commvault Web Server vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2025-04-28. Because it is KEV-listed, defenders should treat it as an active-risk issue even though the supplied public record does not include a technical exploit description or CVSS score. The official guidance points administrators to apply vendor mitigations, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor
Commvault
Product
Web Server
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2025-04-28
Original CVE updated
2025-04-28
Advisory published
2025-04-28
Advisory updated
2025-04-28

Who should care

Organizations running Commvault Web Server, especially security, infrastructure, backup/restore, and cloud service administrators responsible for patching and mitigation decisions.

Technical summary

The supplied sources identify CVE-2025-3928 only as a Commvault Web Server unspecified vulnerability. No CVSS score, exploit mechanics, or affected-version detail is included in the provided corpus. The most important signal available here is CISA KEV inclusion, which indicates confirmed exploitation in the wild or an exploitation risk significant enough to warrant cataloging. Public defenders should rely on the vendor advisory and CISA guidance for remediation steps.

Defensive priority

High. KEV inclusion makes this a time-sensitive remediation item regardless of the limited public technical description.

Recommended defensive actions

  • Review the Commvault security advisory and apply the vendor-recommended mitigations or update path.
  • Check whether any internet-facing or externally reachable Commvault Web Server deployments are in scope.
  • If mitigations are unavailable, follow CISA guidance to discontinue use of the product where feasible.
  • Track exposure against the KEV due date of 2025-05-19 and prioritize remediation before then.
  • Validate whether any compensating controls, access restrictions, or service isolation measures are in place until remediation is complete.

Evidence notes

Evidence in the supplied corpus is limited to official and authoritative records: the CVE is identified by CISA KEV as a Commvault Web Server unspecified vulnerability, added on 2025-04-28 with a due date of 2025-05-19. The source metadata also points to the vendor advisory and NVD record, but no additional technical details were provided in the corpus. No CVSS score was supplied.

Official resources

Public details are limited in the supplied sources. The most reliable public signal is CISA KEV inclusion, so remediation should be prioritized using the vendor advisory and CISA guidance rather than waiting for additional technical detail.