CVE-2026-126155

critical

Description

A incorrect authorization vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow an unauthenticated remote attacker to obtain an authenticated IBE webmail session as any IBE recipient and read or send their encrypted mail via crafted HTTP requests.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-207

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-123824

Details

Source: Mitre, NVD

Published: 2026-11-11

Updated: 2026-11-12

Risk Information

CVSS v2

Base Score: 9.4

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

Severity: High

CVSS v3

Base Score: 9.1

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

Severity: Critical

EPSS

EPSS: 0.00662