CISA KEV · Known exploitedHigh

CVE-2025-3928

Commvault Web Server

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.

CVSS: 8.7
EPSS: 2.09%
CISA KEV: Listed
Published: 2025.04.26

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability2.09%

Technical severityCVSS 8.7

Vulnerability overview

Affected product and versions

Product: Commvault Web Server
Affected versions: 11.36.0, 11.32.0, 11.28.0, 11.20.0, >= 11.20.0 < 11.20.217, >= 11.28.0 < 11.28.141, >= 11.32.0 < 11.32.89, >= 11.36.0 < 11.36.46
Fixed versions: 11.20.217, 11.28.141, 11.32.89, 11.36.46

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA 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.

Due date: 2025.05.19

1
Identify
Confirm that Commvault Web Server and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: 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
CWE: Not available
KEV added: 2025.04.28
Ransomware use: 미확인