CVE-2025-57791Public exploitNetwork attack vector

Unauthenticated session creation via QLogin argument injection

Published Aug 20, 2025 · Updated Sep 10, 2025

Argument injection in Commvault CommCell allows remote attackers to obtain a valid low-privilege session through the login API. CommServe's DoQlogin method concatenates request-controlled commserver, username, and password fields into a QLogin argument string, allowing injected -cs and -localadmin switches to reach a SYSTEM-privileged process. No credentials or user interaction are required; releases 11.32.0 through 11.32.101 and 11.36.0 through 11.36.59 can issue a localadmin token, but this flaw alone does not execute code.

CVSS severity6.9
Medium
EPSS probability22.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Argument injection in Commvault CommCell allows remote attackers to obtain a valid low-privilege session through the login API. CommServe's DoQlogin method concatenates request-controlled commserver, username, and password fields into a QLogin argument string, allowing injected -cs and -localadmin switches to reach a SYSTEM-privileged process. No credentials or user interaction are required; releases 11.32.0 through 11.32.101 and 11.36.0 through 11.36.59 can issue a localadmin token, but this flaw alone does not execute code.

The record

CVE
CVE-2025-57791
Published
Aug 20, 2025
Updated
Sep 10, 2025
Vendor
Commvault
Product
CommCell
Classifications
CWE-88, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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

6.9CommvaultCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-88Improper Neutralization of Argument Delimiters in a Command
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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