CVE-2026-96940

high

Description

Weak authorization in Microsoft Exchange Server allows an authenticated attacker to elevate privileges over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96940

https://securityaffairs.com/200476/security/cve-2026-96940-microsoft-fixes-high-severity-exchange-server-flaw.html

https://www.helpnetsecurity.com/2026/10/05/exchange-server-vulnerability-cve-2026-96940/

https://thehackernews.com/2026/10/microsoft-exchange-flaw-lets.html

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-91771

Details

Source: Mitre, NVD

Published: 2026-10-02

Updated: 2026-10-06

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00496