Known exploited vulnerability
CVE-2025-3928
The short answer
CVE-2025-3928 affects Commvault Web Server and is rated high (CVSS 8.7). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-04-28: attackers are using it, so patch it first.
What it is
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 Vulnerabilities (KEV) Catalog on 2025-04-28.
Weakness: CWE-94.
Severity
8.7 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Yes, since Apr 28, 2025
Federal due date May 19, 2025
EPSS, next 30 days
2.5%
Higher than 85% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
Web Server. NVD's record lists the exact affected versions.
References
- documentation.commvault.com/securityadvisories/CV_2025_03_1.html Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-3928 Third Party AdvisoryUS Government Resource
- www.cisa.gov/news-events/alerts/2025/05/22/advisory-update-cyber-threat-activity-targeting-commvaults-saas-cloud-application-metallic Third Party AdvisoryUS Government Resource
- www.commvault.com/blogs/customer-security-update Vendor Advisory
- www.commvault.com/blogs/notice-security-advisory-update Broken LinkVendor Advisory
- www.commvault.com/blogs/security-advisory-march-7-2025 Vendor Advisory
- www.bleepingcomputer.com/news/security/commvault-says-recent-breach-didnt-impact-customer-backup-data/ Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3928 US Government Resource
Questions
Is CVE-2025-3928 being exploited?
Yes. CISA added CVE-2025-3928 to its Known Exploited Vulnerabilities catalog on 2025-04-28, with a federal remediation due date of 2025-05-19.
How do I fix CVE-2025-3928?
CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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