CVE-2021-34995 in the critical feed json
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Commvault CommCell 11.22.22.
published 2022-01-13 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21642
- cvss
- 8.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 68.9%
- EPSS 68.9% chance of exploitation in 30 days, percentile 99.3%
- public exploits
- 0
- none known
Summary
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Commvault CommCell 11.22.22. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the DownloadCenterUploadHandler class. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this vulnerability to execute code in the context of NETWORK SERVICE. Was ZDI-CAN-13756.
Exploit prediction
68.86% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.8 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Commvault CommCell
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
zerodayinitiative.com
/advisories/ZDI-21-1330/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-34995
- NVD CVE-2021-34995
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