CVE-2025-57788Public exploitNetwork attack vector

Unauthenticated API access via disclosed built-in password

Published Aug 20, 2025 · Updated Aug 20, 2025

Authentication bypass in Commvault CommCell 11.32.0 through 11.32.101 and 11.36.0 through 11.36.59 allows remote attackers to obtain an API token. The publicLink.do endpoint discloses the CommServe client GUID, while installation logic assigns that GUID as the built-in _+PublicSharingUser password. Encoding the disclosed GUID as that account's password at /commandcenter/api/Login returns a valid token whose permitted actions remain bounded by RBAC.

CVSS severity6.9
Medium
EPSS probability2.80%
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 11.32.0 through 11.32.101 and 11.36.0 through 11.36.59 allows remote attackers to obtain an API token. The publicLink.do endpoint discloses the CommServe client GUID, while installation logic assigns that GUID as the built-in _+PublicSharingUser password. Encoding the disclosed GUID as that account's password at /commandcenter/api/Login returns a valid token whose permitted actions remain bounded by RBAC.

The record

CVE
CVE-2025-57788
Published
Aug 20, 2025
Updated
Aug 20, 2025
Vendor
Commvault
Product
CommCell
Classifications
CWE-259, T1078.001, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2025Record 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=11.32.0 <=11.32.101
  2. Affected versionversion=11.36.0 <=11.36.59

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Commvault · CommCellversion=11.32.0 <=11.32.101; version=11.36.0 <=11.36.59

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.9CommvaultCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

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 exploitPublished

Weakness, pattern, technique

CWE-259Use of Hard-coded Password
T1078.001Valid Accounts: Default Accounts
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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