CVE-2026-69399

Unintended proxy or intermediary in Azure Arc allows an authorized attacker to elevate privileges over a network.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69399	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:microsoft:azure_arc:-:*:*:*:*:*:*:*

History

31 Oct 2026, 17:17

Type	Values Removed	Values Added
Summary	~~(en) Azure Arc Elevation of Privilege Vulnerability~~	(en) Unintended proxy or intermediary in Azure Arc allows an authorized attacker to elevate privileges over a network.
CVSS	v2 : ~~unknown~~ v3 : ~~9.8~~	v2 : unknown v3 : 9.9

30 Oct 2026, 22:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~10.0~~	v2 : unknown v3 : 9.8

25 Sep 2026, 20:12

Type	Values Removed	Values Added
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69399 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69399 - Vendor Advisory
First Time		Microsoft azure Arc Microsoft
CPE		cpe:2.3:a:microsoft:azure_arc:-:::::::*

17 Sep 2026, 23:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 23:18

Updated : 2026-10-31 17:17

NVD link : CVE-2026-69399

Mitre link : CVE-2026-69399

CVE.ORG link : CVE-2026-69399

JSON object : View

Products Affected

microsoft

azure_arc

CWE

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

{"id": "CVE-2026-69399", "cveTags": [{"tags": ["exclusively-hosted-service"], "sourceIdentifier": "secure@microsoft.com"}], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69399", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-18T14:12:08.773079Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Azure ARC", "versions": [{"status": "affected", "version": "-"}]}]}], "published": "2026-09-17T23:18:18.793", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69399", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-441"}]}], "descriptions": [{"lang": "en", "value": "Unintended proxy or intermediary in Azure Arc allows an authorized attacker to elevate privileges over a network."}], "lastModified": "2026-10-31T17:17:30.793", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:azure_arc:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FBE84F29-0F6A-46F5-9F06-8D992C0417BA"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}