Is CVE-2021-34997 actively exploited?

No active exploitation of CVE-2021-34997 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-34997 be exploited remotely?

Yes. CVE-2021-34997 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-34997?

CVE-2021-34997 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2021-34997

HIGH

CVE-2021-34997

CWE-434Published: January 13, 2022· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

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 AppStudioUploadHandler 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-13894.

NVD Source

Technical Analysis

CVE-2021-34997 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.