CVE-2026-34327
CVE-2026-34327 is a high-severity vulnerability in Microsoft Partner Center with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-610.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 1% (46th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-28452
- Weakness: CWE-610
- Affected product: Microsoft Partner Center
- Published:
- Last modified:
Description
Externally controlled reference to a resource in another sphere in Microsoft Partner Center allows an unauthorized attacker to perform spoofing over a network.
Frequently asked questions
- What is CVE-2026-34327?
- Externally controlled reference to a resource in another sphere in Microsoft Partner Center allows an unauthorized attacker to perform spoofing over a network.
- How severe is CVE-2026-34327?
- CVE-2026-34327 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2026-34327 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-34327?
- CVE-2026-34327 affects Microsoft Partner Center. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-34327?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-34327 have an EU (EUVD) identifier?
- Yes. CVE-2026-34327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28452.
- When was CVE-2026-34327 published?
- CVE-2026-34327 was published on 2026-05-07 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:microsoft:partner_center:-:*:*:*:*:*:*:*
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