CVE-2026-69356 in Exchange Server

Summary

by MITRE • 09/08/2026

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

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• Responsible: Microsoft
• Reservation: 08/03/2026
• Disclosure: 09/08/2026
• Moderation: accepted
• Entry: VDB-400116
• CPE: ready
• CWE: CWE-79 (confirmed)
• CVSS: 9.3 (CNA)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Energy, Police, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-69356
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-69356
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-69356/