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High severity8.8NVD Advisory· Published Jul 2, 2026· Updated Jul 7, 2026

CVE-2026-54998

CVE-2026-54998

Description

Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.

Affected products

2

Microsoft/Exchange Online2 versions
cpe: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-2026-54998nvdVendor Advisory

News mentions

0

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