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CVE-2026-54998

HIGH

8.8

CVSS 3.1

Metadata

CVE ID: CVE-2026-54998
State: PUBLISHED
Assigner: microsoft
Reserved: 2026-06-16 14:10 UTC
Published: 2026-07-02 22:18 UTC
Last updated: 2026-07-02 22:18 UTC
Primary CWE: CWE-863
CWE-863: Incorrect Authorization
Vendor / Product: Microsoft / Microsoft Exchange Online
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products (1)

Vendor	Product	Platform	Versions
Microsoft	Microsoft Exchange Online	—	-

Weakness (CWE)

CWE	Source	Description
CWE-863	cna	CWE-863: Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References (1)

Microsoft Exchange Online Elevation of Privilege Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54998

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