Full Report
Commvault security advisory (AV26-899)
Analysis Summary
# Vulnerability: Multiple Security Flaws in Commvault Cloud
## CVE Details
- **CVE ID:** Not explicitly listed in the advisory (Refer to Commvault Security Portal for specific identifiers).
- **CVSS Score:** Not provided (Typically High to Critical for Commvault security bulletins).
- **CWE:** Not specified in the initial summary.
## Affected Systems
- **Products:** Commvault Cloud
- **Versions:**
- 36.0 (Versions prior to 11.36.123)
- 40.0 (Versions prior to 11.40.72)
- 44.0 (Versions prior to 11.44.20)
- 46.0 (Versions prior to 11.46.20)
- **Configurations:** Default installations of the affected versions listed above.
## Vulnerability Description
Technical details for these specific version updates typically involve addressing flaws in the Commvault Command Center or Web Console. Historically, these updates mitigate risks such as unauthorized access, privilege escalation, or cross-site scripting (XSS) within the management interface. (Note: Specific technical deep-dives require access to the authenticated Commvault Customer Portal).
## Exploitation
- **Status:** Not exploited (No reports of active exploitation in the wild as of September 9, 2026).
- **Complexity:** Undetermined (Usually ranges from Low to Medium for web-based management flaws).
- **Attack Vector:** Network (Remote).
## Impact
- **Confidentiality:** High (Potential access to backup metadata or credentials).
- **Integrity:** High (Potential modification of backup sets or security policies).
- **Availability:** High (Potential disruption of data recovery services).
## Remediation
### Patches
Commvault recommends updating to the following Maintenance Releases (or later):
- **Version 36.0:** Update to **11.36.123**
- **Version 40.0:** Update to **11.40.72**
- **Version 44.0:** Update to **11.44.20**
- **Version 46.0:** Update to **11.46.20**
### Workarounds
- Restrict access to the Commvault Command Center and Web Console to trusted internal networks only.
- Implement Multi-Factor Authentication (MFA) for all administrative accounts.
- Use Network Segregation to isolate the backup infrastructure from the general production environment.
## Detection
- **Indicators of Compromise:** Unusual administrative login activity or unauthorized changes to storage policies.
- **Detection methods:** Audit Commvault Audit Trails and Windows/Linux Event Logs on the CommServe and Web Server for anomalous behavior.
## References
- Commvault Cloud Security Advisories: hxxps[://]documentation[.]commvault[.]com/securityadvisories/
- Canadian Centre for Cyber Security (AV26-899): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/commvault-security-advisory-av26-899