CVE-2026-77103

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

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:a:commvault:commvault::::::::
	cpe:2.3:a:commvault:commvault::::::::
	cpe:2.3:a:commvault:commvault::::::::
	cpe:2.3:a:commvault:commvault::::::::

OR	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

History

No history.

Information

Published : 2026-09-08 13:17

Updated : 2026-09-09 15:56

NVD link : CVE-2026-77103

Mitre link : CVE-2026-77103

CVE.ORG link : CVE-2026-77103

JSON object : View

Products Affected

linux

linux_kernel

microsoft

windows

commvault

commvault

CWE

CWE-288

Authentication Bypass Using an Alternate Path or Channel

{"id": "CVE-2026-77103", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-77103", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T13:23:49.319206Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333", "affectedData": [{"vendor": "Commvault", "product": "Commvault Cloud", "versions": [{"status": "affected", "changes": [{"at": "11.46.20", "status": "unaffected"}], "version": "11.46.0", "versionType": "custom", "lessThanOrEqual": "11.46.19"}, {"status": "affected", "changes": [{"at": "11.44.20", "status": "unaffected"}], "version": "11.44.0", "versionType": "custom", "lessThanOrEqual": "11.44.19"}, {"status": "affected", "changes": [{"at": "11.40.72", "status": "unaffected"}], "version": "11.40.0", "versionType": "custom", "lessThanOrEqual": "11.40.71"}, {"status": "affected", "changes": [{"at": "11.36.123", "status": "unaffected"}], "version": "11.36.0", "versionType": "custom", "lessThanOrEqual": "11.36.122"}], "platforms": ["Windows", "Linux"], "defaultStatus": "unknown"}]}], "published": "2026-09-08T13:17:26.140", "references": [{"url": "https://documentation.commvault.com/securityadvisories/CV_2026_08_5.html", "tags": ["Vendor Advisory"], "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-288"}]}], "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."}], "lastModified": "2026-09-09T15:56:34.583", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D5E9F88-DDA2-4F7E-96C8-63CE8AACF381", "versionEndExcluding": "11.36.123", "versionStartIncluding": "11.36.0"}, {"criteria": "cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F195D789-6414-4A1F-B6B2-E21035032D0A", "versionEndExcluding": "11.40.72", "versionStartIncluding": "11.40.0"}, {"criteria": "cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "43942B05-3043-419D-BE53-4BC30CECB734", "versionEndExcluding": "11.44.20", "versionStartIncluding": "11.44.0"}, {"criteria": "cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D16402F-8EBF-42ED-BC4A-8053736561D4", "versionEndExcluding": "11.46.20", "versionStartIncluding": "11.46.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "050066fd-a2f9-4f32-ab5d-4c53f48bc333"}