Read the docs
TI-2021-13982 Aliases CVE-2021-34995GHSA-5vg2-m4qf-m5p5

Unrestricted file upload in Commvault CommCell

Priority HIGH 75CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

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.

Why it matters now

EPSS 0.68864 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
CommvaultCommCell11.22.22—No fix listedCNA
  • CommCell VendorCommvault Affected 11.22.22 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:commvault:commcell:11.22.22:*:*:*:*:*:*:*11.22.22VulnerableCommvault
  • cpe:2.3:a:commvault:commcell:11.22.22:*:*:*:*:*:*:* Versions 11.22.22 Vulnerable ·Commvault

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34995
  2. 2026-10-03 Alias added: GHSA-5vg2-m4qf-m5p5

References

Advisory 1

  • TI-2021-13983 This vulnerability allows remote attackers to execute arbitrary code on affected… CVSS 3.1HIGH 8.8
  • TI-2021-13980 Improper authentication in Commvault CommCell CVSS 3.1CRITICAL 9.8
  • TI-2021-13981 Improper input validation in Commvault CommCell CVSS 3.1HIGH 8.8
  • TI-2021-13984 Unrestricted file upload in Commvault CommCell CVSS 3.1HIGH 8.8
  • TI-2020-15787 In CommCell in Commvault before 14.68, 15.x before 15.58, 16.x before 16.44, 17.x before… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences