ZDI-21-1328: Commvault CommCell CVSearchService Authentication Bypass Vulnerability

This vulnerability allows remote attackers to bypass authentication on affected installations of Commvault CommCell. Authentication is not required to exploit this vulnerability. The specific flaw exists within the CVSearchService service. The issue results from the lack of proper validation prior to authentication. An attacker can leverage this vulnerability to bypass authentication on the system.

Affected Software

1 affected component
Commvault CommCell

Event History

Feb 24, 2026
Advisory Published
via ZDI·08:02 PM
Data Sourced
via ZDI·08:02 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of ZDI-21-1328?

The severity of ZDI-21-1328 is high due to its ability to allow remote attackers to bypass authentication.

2

How do I fix ZDI-21-1328?

To fix ZDI-21-1328, apply the latest security updates and patches provided by Commvault for the CommCell product.

3

Which software is affected by ZDI-21-1328?

ZDI-21-1328 affects installations of Commvault CommCell software.

4

Can ZDI-21-1328 be exploited without authentication?

Yes, ZDI-21-1328 can be exploited without authentication, allowing attackers to manipulate affected systems.

5

What specific service is flawed in ZDI-21-1328?

The specific flaw in ZDI-21-1328 exists within the CVSearchService service of the CommCell software.

Contact

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