Sigma rule: Commvault QLogin Argument Injection Authentication Bypass (CVE-2025-57791)

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-5ec29ba57cd1, updated 2025-10-20T00:00:00.000Z.

Rule

Title
Commvault QLogin Argument Injection Authentication Bypass (CVE-2025-57791)
Status
experimental
Level
high
Author
X__Junior (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems)
Date
2025-10-20
File
rules-emerging-threats/2025/Exploits/CVE-2025-57791/proc_creation_win_exploit_cve_2025_57791.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of argument injection in the Commvault qlogin command - potential exploitation for CVE-2025-57791.
An attacker can inject the `-localadmin` parameter via the password field to bypass authentication and gain a privileged token.

Log source

product
windows
category
process_creation

Detection

selection:
    CommandLine|contains|all:
        - 'qlogin'
        - ' -cs '
        - ' -localadmin'
        - ' -clp '
        - '_localadmin__'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access
  • attack.t1190
  • detection.emerging-threats
  • cve.2025-57791

CVEs this rule names

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Exploits/CVE-2025-57791/proc_creation_win_exploit_cve_2025_57791.yml

Sources and licences

  • SigmaHQ

    "Commvault QLogin Argument Injection Authentication Bypass (CVE-2025-57791)" by X__Junior (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Exploits/CVE-2025-57791/proc_creation_win_exploit_cve_2025_57791.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Commvault QLogin Argument Injection Authentication Bypass (CVE-2025-57791)",
entity page, dataset version ref-5ec29ba57cd1, updated 2025-10-20T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/ff0225a0-1d9a-4bae-ab26-6038b18bb6d4 (accessed 2026-11-03).
Underlying source: SigmaHQ rule ff0225a0-1d9a-4bae-ab26-6038b18bb6d4, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.