CVE-2026-34327Critical
Microsoft Partner Center Spoofing Vulnerability
Assessment
Externally controlled reference to a resource in another sphere in Microsoft Partner Center allows an unauthorized attacker to perform spoofing over a network.
- Severity
- Critical
- CVSS base score
- 8.2CVSS:3.1/
AV:N/ AC:L/ PR:N/ UI:N/ S:U/ C:H/ I:L/ A:N/ E:U/ RL:O/ RC:C - Impact
- Spoofing
- EPSS, next 30 days
- 0.6%Higher than 46.8% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Not assessed
- Publicly disclosed
- No
- Customer action
- Not required (service-side fix)
- Component
- Microsoft Partner Center
- Weakness
- CWE-610: Externally Controlled Reference to a Resource in Another Sphere
- Issued by
- Microsoft
- Published
- 7 May 2026 · May 2026
- Last revised
- 7 May 2026
Updates that fix it
0 KBsNo KB listed
MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.
Affected products
Azure1 affected product
- Microsoft Partner Center