CVE-2021-34993 - CVE House
Back to Database
Status published Critical CVE-2021-34993

This vulnerability allows remote attackers to bypass authentication on affected...

Vulnerability Description

This vulnerability allows remote attackers to bypass authentication on affected installations of Commvault CommCell 11.22.22. 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. Was ZDI-CAN-13706.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-34993

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Brandon Perry, Justin Kennedy and Steven Seeley of Source Incite

References

More from Commvault

View All →
CVE-2025-57791
Argument Injection Vulnerability in CommServe
Medium 6.9
CVE-2025-57790
Path Traversal Vulnerability
High 8.7
CVE-2025-57789
Vulnerability in Initial Administrator Login Process
Medium 5.3
CVE-2025-57788
Unauthorized API Access Risk
Medium 6.9
CVE-2025-3928
Commvault Web Server unspecified vulnerability
High 8.7

Affected Vendor

Affected Software

CommCell
Vulnerable Versions:
11.22.22

Timeline

Official Publish: January 13th, 2022
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-287

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1078 Valid Accounts
Persistence
T1556 Modify Authentication Process
Credential Access