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 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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.054 (92.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.054 · newest: 0.054 · change: 0.000
Affected products
- Commvault Commcell — versions 11.22.22
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zerodayinitiative.com/advisories/ZDI-21-1328/ (VDB Entry, Third Party Advisory)
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.