CVE-2026-77106 in Commvault
Summary
by MITRE • 09/08/2026
Cvlaunchd contained a missing authorization issue affecting command execution authorization. Software customers upgrade to resolved maintenance release. Update all Commvault installations, including Commserve, Webserver, Command Center, Media Agents, Clients and HyperScale X.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified in Cvlaunchd represents a critical failure in access control mechanisms within the Commvault data management suite. Specifically, this issue stems from missing authorization checks that govern command execution privileges. In secure software architecture, every request to execute administrative or system-level commands must be validated against the user's assigned roles and permissions before processing occurs. The absence of these checks allows an authenticated attacker with lower-privileged credentials to potentially escalate their access level by invoking privileged functions intended only for administrators. This type of flaw is classically categorized under CWE-269, which denotes Improper Privilege Control, as it involves a failure to enforce the principle of least privilege during runtime operations.
From a technical perspective, Cvlaunchd serves as a core daemon process responsible for managing and launching various background tasks within the Commvault ecosystem. When this component fails to verify authorization correctly, it creates an avenue for unauthorized command execution. An attacker who has gained initial access to the system through compromised credentials or other vectors can exploit this gap to execute commands with elevated privileges without proper verification. This bypasses standard security controls and effectively grants the attacker a higher level of control over the affected systems than intended by the system administrators. Such vulnerabilities are often mapped to MITRE ATT&CK techniques related to privilege escalation, particularly those involving local exploitation or abuse of existing software features for unintended purposes.
The operational impact of this vulnerability is significant due to its potential to compromise the integrity and confidentiality of enterprise data management operations. Commvault environments typically handle sensitive backup and recovery tasks across distributed infrastructures including Commserve servers, Webserver instances, Command Center interfaces, Media Agents, Clients, and HyperScale X nodes. If an attacker successfully exploits this missing authorization issue, they could manipulate backup jobs, alter retention policies, or even exfiltrate data by executing commands that bypass security logging and monitoring mechanisms. This undermines the reliability of disaster recovery strategies and exposes critical organizational assets to unauthorized modification or theft.
To mitigate this risk, immediate action is required across all components of the Commvault infrastructure. Customers must upgrade their installations to the resolved maintenance release provided by Commvault. It is imperative to update every node within the environment, including the central Commserve, Webserver, Command Center, Media Agents, Clients, and HyperScale X systems. Delaying updates on any single component can leave the entire ecosystem vulnerable if that specific node serves as a pivot point for lateral movement or privilege escalation attacks. Regular patch management cycles should be enforced to ensure that such authorization flaws are addressed promptly before they can be exploited in production environments.