CRITICAL 9.1 Microsoft
CVE-2026-48579
Microsoft Exchange Online Information Disclosure Vulnerability
Microsoft Security Update 2026-Jun: Microsoft Exchange Online Information Disclosure Vulnerability
Affected Products
- Microsoft Exchange Online
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48579
- https://nvd.nist.gov/vuln/detail/CVE-2026-48579
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-06-09 via Microsoft. Affected: Microsoft Exchange Online.
Risk Timeline
CVE Disclosed2026-06-09 · 55 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48579NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-48579Related Vulnerabilities
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|---|---|---|---|
| CVE-2026-66803 | Improper access control in Azure Cosmos DB allows an unauthorized attacker to ex | CRITICAL | 10.0 |
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| CVE-2026-57106 | Data Quality Elevation of Privilege Vulnerability | CRITICAL | 10.0 |
| CVE-2026-33819 | Microsoft Bing Remote Code Execution Vulnerability | CRITICAL | 10.0 |
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