This vulnerability allows remote attackers to bypass authentication on affected installations of Commvault CommCell 11.22.22.

published 2022-01-13 4y ago modified 2026-06-17 4mo ago also EUVD-2021-21640

cvss: 9.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 5.8%; EPSS 5.8% chance of exploitation in 30 days, percentile 93%
public exploits: 0; none known

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.

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Exploit prediction

5.83% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Commvault CommCell

Classification

Weakness

CWE-287 Improper Authentication

References

zerodayinitiative.com /advisories/ZDI-21-1328/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2021-34993
NVD CVE-2021-34993

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