What is CVE-2021-34993?

CVE-2021-34993 is a critical-severity vulnerability in Commvault Commcell, classified under Improper Authentication. CVSS score: 9.8/10. Published 2022-01-13.

How severe is CVE-2021-34993?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-34993 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Commvault Commcell

CVE-2021-34993

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…

Vulnerability class: Broken Authentication

EPSS: 0.008 (74.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Commvault Commcell — versions 11.22.22

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

References

www.zerodayinitiative.com/advisories/ZDI-21-1328/ (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-34993?: CVE-2021-34993 is a critical-severity vulnerability in Commvault Commcell, classified under Improper Authentication. CVSS score: 9.8/10. Published 2022-01-13.
How severe is CVE-2021-34993?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-34993 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.