CVE-2026-48579 in Exchange Online

Summary

by MITRE • 06/05/2026

Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

• Responsible: Microsoft
• Reservation: 05/21/2026
• Disclosure: 06/05/2026
• Moderation: accepted
• Entry: VDB-368417
• CPE: ready
• CWE: CWE-285 (confirmed)
• CVSS: 9.1 (CNA)
• EPSS: 0.00000
• KEV: no
• Activities: very high
• Sector: Telecommunication, Finance, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-48579
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-48579
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-48579/