---
title: "CVE-2025-3928: Commvault Web Server Unspecified Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-3928/
description: "CVE-2025-3928 (Commvault Web Server): Exploited in the wild (CISA KEV). Commvault Web Server has an unspecified vulnerability that can be exploited by a…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-04-25
date_modified: 2026-10-07
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-3928"
kev: true
cvss: 8.7
epss: 0.02484
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-3928: Commvault Web Server Unspecified Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Commvault Web Server. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-04-28, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-05-19 ; treat that as the outer limit, not the target.
- EPSS 2.5% , percentile 84: FIRST’s model estimates a 2.5% chance of exploitation activity in the next 30 days, higher than 84% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.

## 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.

## Affected products (CVE record)

- 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

## Severity

- cisa-cg CVSS 3.1: 8.8 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
- cisa-cg CVSS 4.0: 8.7 `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`

## Exploitation

- CISA KEV: added 2025-04-28; federal due date 2025-05-19. Known ransomware use: Unknown.
- 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 2.48% probability of exploitation activity in the next 30 days; percentile 84.

## Sources

- [Listed in CISA KEV notes (documentation.commvault.com)](https://documentation.commvault.com/securityadvisories/CV_2025_03_1.html)
- [Listed in CISA KEV notes (commvault.com)](https://www.commvault.com/blogs/notice-security-advisory-update)
- [CVE.org record CVE-2025-3928](https://www.cve.org/CVERecord?id=CVE-2025-3928)
- [NVD entry CVE-2025-3928](https://nvd.nist.gov/vuln/detail/CVE-2025-3928)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3928)
- [url](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-3928)
- [url](https://www.commvault.com/blogs/security-advisory-march-7-2025)
- [url](https://www.cisa.gov/news-events/alerts/2025/05/22/advisory-update-cyber-threat-activity-targeting-commvaults-saas-cloud-application-metallic)
- [url](https://www.commvault.com/blogs/customer-security-update)
- [bleepingcomputer.com](https://www.bleepingcomputer.com/news/security/commvault-says-recent-breach-didnt-impact-customer-backup-data/)

---
Source page: https://erroneo.us/security/cve/CVE-2025-3928/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt