Vulnerability details

CVE-2026-77103

Commvault Cloud

CommServe Information Disclosure

CVSS 4.0

8.7High

Official description

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

CVSS scores

Score	Version	Source	Vector
8.7High	4.0	CVEProject cvelistV5 (CNA) (Commvault)	`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`

Affected products

Vendor	Product	Versions	Source
Commvault	Commvault Cloud	11.36.0 ≤ v ≤ 11.36.122	CVEProject cvelistV5 (CNA)
Commvault	Commvault Cloud	11.40.0 ≤ v ≤ 11.40.71	CVEProject cvelistV5 (CNA)
Commvault	Commvault Cloud	11.44.0 ≤ v ≤ 11.44.19	CVEProject cvelistV5 (CNA)
Commvault	Commvault Cloud	11.46.0 ≤ v ≤ 11.46.19	CVEProject cvelistV5 (CNA)

References and advisories

https://documentation.commvault.com/securityadvisories/CV_2026_08_5.html

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Details

Published: 2026-09-08
Last updated: 2026-09-08
State: Published
Assigner (CNA): Commvault

Exploit prediction (EPSS)

0.49%

Probability of exploitation in 30 days

42.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-288
Authentication Bypass Using an Alternate Path or Channel