EUVD-2026-63628
GHSA-7fcf-m943-h7cx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Partner Center requires at minimum a partner account to interact with its API, making PR:L more accurate than PR:N; all other metrics align with the network-accessible, scope-changing, confidentiality-only disclosure pattern.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
Authorization bypass through user-controlled key in Microsoft Partner Center allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Microsoft Partner Center exposes cross-tenant information to unauthenticated network attackers via an authorization bypass rooted in user-controlled key manipulation (CWE-639). The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H) indicates low-complexity, scopechanging exploitation that can reach confidential partner or customer data beyond the attacker's own organizational boundary. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates network access is sufficient with no authentication barrier per the official scoring, and the underlying condition is the application's use of user-supplied keys or resource identifiers as the sole access control mechanism without server-side authorization validation (CWE-639). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.6 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N) rates this as High severity with a fully network-accessible attack surface, low complexity, and no stated prerequisites, making the vulnerability attractive for automated enumeration at scale. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is the vendor-released patch available through the Microsoft Security Response Center at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69558; the exact patched version number is not specified in currently available data and must be confirmed directly from the MSRC advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, verify Partner Center deployment version against Microsoft Security Response Center advisories and apply the vendor-released patch to all instances. …
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External POC / Exploit Code
Leaving vuln.today