CVE-2026-26137

critical Microsoft
CVSS v3 Base Score
9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
EPSS Score
0.0%
Exploitation probability in 30 days
Top 91% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Published: March 19, 2026 (55 days ago)
Last Modified: March 27, 2026
Vendor: Microsoft
Source: NVD

Description

Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.

CWE

CWE-918

Affected Products

microsoft 365 copilot chat

References

🔗 msrc.microsoft.com