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CVE-2026-26137

CRITICAL

9.9

CVSS 3.1

Metadata

CVE ID: CVE-2026-26137
State: PUBLISHED
Assigner: microsoft
Reserved: 2026-02-11 16:24 UTC
Published: 2026-03-19 21:06 UTC
Last updated: 2026-04-14 16:36 UTC
Primary CWE: CWE-918
CWE-918: Server-Side Request Forgery (SSRF)
Vendor / Product: Microsoft / Microsoft Exchange Online
Sources: cve.org · NVD

Severity & Metrics

9.9 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Microsoft	Microsoft Exchange Online	—	-

Weakness (CWE)

CWE	Source	Description
CWE-918	cna	CWE-918: Server-Side Request Forgery (SSRF)

CVSS scores (1)

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

References (1)

Microsoft Exchange Elevation of Privilege Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26137

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