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Vulnerability record · CVE-2026-77103 · published 8 September 2026

CVE-2026-77103: Commvault authentication bypass via alternate path vulnerability

Commvault · Commvault

CommServe contained an authentication bypass issue affecting access authorization and information disclosure. Software customers upgrade to resolved maintenance release. Update CommServe.

8.7 CVSS 4.0 High EPSS 0.50% · top 59.8% CWE-288 · Authentication bypass via alternate path
8.7CVSS 4.0 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
9 Sep 2026Last modified by NVD

Description

CommServe contained an authentication bypass issue affecting access authorization and information disclosure. Software customers upgrade to resolved maintenance release. Update CommServe.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://documentation.commvault.com/securityadvisories/CV_2026_08_5.html Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-77103), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.