What is CVE-2026-69558?

CVE-2026-69558 is a high-severity vulnerability in Microsoft Partner Center, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.6/10. Published 2026-08-20.

How severe is CVE-2026-69558?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Microsoft Partner Center

CVE-2026-69558

Authorization bypass through user-controlled key in Microsoft Partner Center allows an unauthorized attacker to disclose information over a network.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Microsoft Partner Center

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-69558?: CVE-2026-69558 is a high-severity vulnerability in Microsoft Partner Center, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.6/10. Published 2026-08-20.
How severe is CVE-2026-69558?: High severity. CVSS v3 base score is 8.6 out of 10.