Auth bypass in Commvault

CVE-2026-77097

Private Metrics Server contained a missing authentication condition affecting metrics upload functionality and service availability. Software customers upgrade to resolved maintenance release. Update Private Metrics Server.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-77097: held from 0.003 to 0.005.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-77097?
CVE-2026-77097 is a high-severity vulnerability in Commvault, classified under Missing Authentication for Critical Function. CVSS score: 8.2/10. Published 2026-09-08.
How severe is CVE-2026-77097?
High severity. CVSS v3 base score is 8.2 out of 10.