CVE-2021-34993Network attack vector

Unauthenticated file download via CVSearchService validation failure

Published Jan 13, 2022 · Updated Aug 4, 2024

Authentication bypass in Commvault CommCell 11.22.22 allows remote attackers to download files through the CVWebService endpoint. CVSearchService fails to validate requests to a subset of web server APIs before authentication, exposing server-hosted files to unauthorized retrieval. No credentials or user interaction are required, but public material does not identify the affected API methods or request fields.

CVSS severity9.8
Critical
EPSS probability5.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Commvault CommCell 11.22.22 allows remote attackers to download files through the CVWebService endpoint. CVSearchService fails to validate requests to a subset of web server APIs before authentication, exposing server-hosted files to unauthorized retrieval. No credentials or user interaction are required, but public material does not identify the affected API methods or request fields.

The record

CVE
CVE-2021-34993
Published
Jan 13, 2022
Updated
Aug 4, 2024
Vendor
Commvault
Product
CommCell
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.22.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Commvault · CommCellversion=11.22.22

Published CVSS scores

9.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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