CVE-2025-3928 — Commvault Web Server Unspecified Vulnerability

Commvault Web Server has an unspecified vulnerability that can be exploited by a remote, authenticated attacker. According to the Commvault advisory: "Webservers can be compromised through bad actors creating and executing webshells." Fixed in version 11.36.46, 11.32.89

01What is this vulnerability?

Commvault Web Server has an unspecified vulnerability that can be exploited by a remote, authenticated attacker. According to the Commvault advisory: "Webservers can be compromised through bad actors creating and executing webshells." Fixed in version 11.36.46, 11.32.89, 11.28.141, and 11.20.217 for Windows and Linux platforms. This vulnerability was added to the CISA Known Exploited…

02Affected products

Vendor	Product	Versions
Commvault	Web Server	11.36.0, 11.36.46, 11.32.0, 11.32.89, 11.28.0, 11.28.141, 11.20.0, 11.20.217

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2025-04-28. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-04-25T15:56:28.112Z
• Last modified: 2026-02-26T18:28:03.538Z
• Added to CISA KEV: 2025-04-28
• BOD 22-01 due: 2025-05-19

09References

• documentation.commvault.com — https://documentation.commvault.com/securityadvisories/CV_2025_03_1.html
• www.cisa.gov — https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext…
• www.commvault.com — https://www.commvault.com/blogs/security-advisory-march-7-2025
• www.commvault.com — https://www.commvault.com/blogs/notice-security-advisory-update
• www.cisa.gov — https://www.cisa.gov/news-events/alerts/2025/05/22/advisory-update-cyber-threat-…
• www.commvault.com — https://www.commvault.com/blogs/customer-security-update