CVE-2026-77103 - Vulnerability Details - OpenCVE

Description

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

Published: 2026-09-08

Score: 8.7 High

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Commvault

Commvault Cloud

unknown

Version	Status	Constraints
`11.46.0`	affected	≤ 11.46.19
`11.44.0`	affected	≤ 11.44.19
`11.40.0`	affected	≤ 11.40.71
`11.36.0`	affected	≤ 11.36.122

No data.

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

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

History

Tue, 08 Sep 2026 12:30:00 +0000

Type	Values Removed	Values Added
Description		CommServe contained an authentication bypass issue affecting access authorization and information disclosure. Software customers upgrade to resolved maintenance release. Update CommServe.
Title		CommServe Information Disclosure
References		https://documentation.commvault.com/securityadvisories/CV_2026_08_5.html
Metrics		cvssV4_0 `{'score': 8.7, 'vector': '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'}`

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: Commvault

Published: 2026-09-08T12:12:54.437Z

Updated: 2026-09-08T13:25:38.622Z

Reserved: 2026-08-20T10:57:52.110Z

Link: CVE-2026-77103

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-08T13:17:26.140

Modified: 2026-09-08T13:17:26.140

Link: CVE-2026-77103

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-77103", "assignerOrgId": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "state": "PUBLISHED", "assignerShortName": "Commvault", "dateReserved": "2026-08-20T10:57:52.110Z", "datePublished": "2026-09-08T12:12:54.437Z", "dateUpdated": "2026-09-08T13:25:38.622Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "shortName": "Commvault", "dateUpdated": "2026-09-08T12:12:54.437Z"}, "title": "CommServe Information Disclosure", "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-288: Authentication Bypass Using an Alternate Path or Channel"}]}], "affected": [{"vendor": "Commvault", "product": "Commvault Cloud", "platforms": ["Windows", "Linux"], "defaultStatus": "unknown", "versions": [{"status": "affected", "version": "11.46.0", "lessThanOrEqual": "11.46.19", "changes": [{"at": "11.46.20", "status": "unaffected"}], "versionType": "custom"}, {"status": "affected", "version": "11.44.0", "lessThanOrEqual": "11.44.19", "changes": [{"at": "11.44.20", "status": "unaffected"}], "versionType": "custom"}, {"status": "affected", "version": "11.40.0", "lessThanOrEqual": "11.40.71", "changes": [{"at": "11.40.72", "status": "unaffected"}], "versionType": "custom"}, {"status": "affected", "version": "11.36.0", "lessThanOrEqual": "11.36.122", "changes": [{"at": "11.36.123", "status": "unaffected"}], "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "CommServe contained an authentication bypass issue affecting access authorization and information disclosure. Software customers upgrade to resolved maintenance release. Update CommServe."}], "references": [{"url": "https://documentation.commvault.com/securityadvisories/CV_2026_08_5.html"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"version": "4.0", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Michael Tucker and Tan Chew Keong from the XOR team at JPMorgan Chase.", "type": "reporter"}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-288", "lang": "en", "description": "CWE-288 Authentication Bypass Using an Alternate Path or Channel"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T13:23:49.319206Z", "id": "CVE-2026-77103", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T13:25:38.622Z"}}]}}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "platforms": ["Windows", "Linux"], "product": "Commvault Cloud", "vendor": "Commvault", "versions": [{"changes": [{"at": "11.46.20", "status": "unaffected"}], "lessThanOrEqual": "11.46.19", "status": "affected", "version": "11.46.0", "versionType": "custom"}, {"changes": [{"at": "11.44.20", "status": "unaffected"}], "lessThanOrEqual": "11.44.19", "status": "affected", "version": "11.44.0", "versionType": "custom"}, {"changes": [{"at": "11.40.72", "status": "unaffected"}], "lessThanOrEqual": "11.40.71", "status": "affected", "version": "11.40.0", "versionType": "custom"}, {"changes": [{"at": "11.36.123", "status": "unaffected"}], "lessThanOrEqual": "11.36.122", "status": "affected", "version": "11.36.0", "versionType": "custom"}]}], "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "CommServe contained an authentication bypass issue affecting access authorization and information disclosure. Software customers upgrade to resolved maintenance release. Update CommServe."}], "id": "CVE-2026-77103", "lastModified": "2026-09-08T13:17:26.140", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "type": "Secondary"}]}, "published": "2026-09-08T13:17:26.140", "references": [{"source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "url": "https://documentation.commvault.com/securityadvisories/CV_2026_08_5.html"}], "sourceIdentifier": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "vulnStatus": "Received"}