CVE-2026-77097 Commvault CVE debrief

Who should care

Commvault Cloud administrators and security teams responsible for ensuring the security and integrity of Commvault Cloud instances should be aware of this vulnerability and take immediate action to upgrade to the resolved maintenance release.

Why it matters

CVE-2026-77097 is a high-severity vulnerability in Commvault Cloud's Private Metrics Server that requires immediate attention from administrators to prevent potential service disruptions and unauthorized metrics uploads.

• Potential service disruptions due to unauthorized metrics uploads
• Increased risk of unauthorized access to Commvault Cloud instances
• Need for immediate upgrade to resolved maintenance release to prevent exploitation
• Potential impact on Commvault Cloud instance availability and metrics accuracy

Technical summary

The Private Metrics Server in Commvault Cloud contains a missing authentication condition, affecting metrics upload functionality and service availability. This vulnerability has a CVSS score of 8.8 and is considered high-severity. The vulnerability allows unauthorized metrics upload and service disruption, affecting Commvault Cloud instances. The issue requires immediate attention from Commvault Cloud administrators to prevent potential service disruptions and unauthorized metrics uploads.

Defensive priority

Commvault Cloud administrators should prioritize upgrading to the resolved maintenance release to prevent potential service disruptions and unauthorized metrics uploads.

Recommended defensive actions

• Upgrade to the resolved maintenance release for Commvault Cloud
• Review and update inventory of Commvault Cloud instances to ensure they are running the latest version
• Monitor Commvault Cloud instances for potential service disruptions or unauthorized metrics uploads

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its high CVSS score and affected versions of Commvault Cloud. The evidence is based on the official CVE Program record and the NIST NVD detail page. The vulnerability has a high CVSS score of 8.8 and is considered high-severity. The affected product is Commvault Cloud's Private Metrics Server. The vulnerability allows unauthorized metrics upload and service disruption. The source confidence is high based on

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.