Critical severity9.1NVD Advisory· Published Jun 4, 2026· Updated Jun 5, 2026
CVE-2026-48579
CVE-2026-48579
Description
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
Affected products
2cpe:2.3:a:microsoft:exchange_online:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:microsoft:exchange_online:-:*:*:*:*:*:*:*
- (no CPE)
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48579nvdVendor Advisory
News mentions
3- Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilitiesCisco Talos Intelligence · Jun 9, 2026
- Microsoft: Seven Critical and High Vulnerabilities Disclosed on June 4thVypr Intelligence · Jun 4, 2026
- June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-DaysCrowdStrike Blog