CVE-2025-3928: Commvault Web Server Unspecified Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 28 Apr 2025, 3 days after the CVE record was published.

How likely is exploitation in the next 30 days?

2.5%

EPSS score, percentile 84.8 of all scored records

How severe?

8.7 High

CVSS v4.0 base score, given by the CNA

What should I do?

Required action (CISA), due 19 May 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected: 11.36.0 up to, not including, 11.36.46; 11.32.0 up to, not including, 11.32.89; 11.28.0 up to, not including, 11.28.141; 11.20.0 up to, not including, 11.20.217

Unaffected: 11.36.46; 11.32.89; 11.28.141; 11.20.217

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 19 May 2025.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://documentation.commvault.com/securityadvisories/CV_2025_03_1.html
• https://www.commvault.com/blogs/notice-security-advisory-update
• https://nvd.nist.gov/vuln/detail/CVE-2025-3928

Affected products and versions

As listed in the CVE record.

Versions not listed are: unaffected.

Versions the record lists as unaffected: 11.36.46, 11.32.89, 11.28.141, 11.20.217.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Commvault Web Server contains an unspecified vulnerability that allows a remote, authenticated attacker to create and execute webshells.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2025-3928 to its Known Exploited Vulnerabilities (KEV) catalog on 28 Apr 2025.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 19 May 2025.
• The CVE record was published on 25 Apr 2025, 3 days before it was added to KEV.
• The CVE record carries a CVSS v4.0 base score of 8.7 (High), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 2.5% (percentile 84.8), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

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, 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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-94: Improper Control of Generation of Code ('Code Injection')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• url
• url
• url
• url
• url
• url

More exploited Commvault vulnerabilities

• CVE-2025-34028: Commvault Command Center Path Traversal Vulnerability (added 2 May 2025)