CVE-2026-77103

Analyzed Analyzed - Analysis Complete

Authentication Bypass in CommServe Leading to Information Disclosure

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Commvault

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-77103

Affected Vendors & Products

Vendor	Product	Version / Range
commvault	commvault	From 11.36.0 (inc) to 11.36.123 (exc)
commvault	commvault	From 11.40.0 (inc) to 11.40.72 (exc)
commvault	commvault	From 11.44.0 (inc) to 11.44.20 (exc)
commvault	commvault	From 11.46.0 (inc) to 11.46.20 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-288	The product requires authentication, but the product has an alternate path or channel that does not require authentication.

Attack-Flow Graph

Executive Summary

CommServe had an authentication bypass issue that allowed unauthorized access and information disclosure. This means attackers could bypass normal authentication to gain access to sensitive data or systems without proper credentials.

Detection Guidance

To detect this vulnerability, check if your CommServe software version falls between 11.36.0 and 11.46.19. Log into the Command Center, go to the Servers section, filter by relevant roles, and verify if all servers are updated to version 11.36.20, 11.40.72, 11.44.20, or 11.46.20 or higher.

Impact Analysis

This vulnerability could allow attackers to access sensitive information or perform unauthorized actions on affected systems. It may lead to data breaches, system compromise, or further network infiltration depending on the attacker's goals.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements under GDPR, HIPAA, or other regulations. Organizations may face legal penalties, fines, or reputational damage if data is exposed due to this issue.

Mitigation Strategies

Immediately upgrade CommServe to version 11.36.20, 11.40.72, 11.44.20, or 11.46.20 or higher to resolve the authentication bypass issue.

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