CVE-2021-36166

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-330

Affected software

Vendor	Product	Versions
Fortinet	Fortinet FortiMail	FortiMail before 7.0.1

References

https://fortiguard.com/psirt/FG-IR-21-028Vendor Advisory
https://fortiguard.com/psirt/FG-IR-21-028Vendor Advisory

Timeline

Published: Mar 1, 2022
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-361675.3An improper authorization vulnerabiltiy [CWE-285] in FortiClient Windows versions 7.0.0 and 6.4.6 and below and 6.2.8 and below may allow an CVE-2021-361686.5A Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Fortinet FortiPortal 6.x before 6.0.5, FortiPortal 5.3.x CVE-2021-361696.0A Hidden Functionality in Fortinet FortiOS 7.x before 7.0.1, FortiOS 6.4.x before 6.4.7 allows attacker to Execute unauthorized code or comm CVE-2021-36177.2A vulnerability was reported in Lenovo Smart Camera X3, X5, and C2E that could allow command injection by setting a specially crafted networ CVE-2021-361703.2An information disclosure vulnerability [CWE-200] in FortiAnalyzerVM and FortiManagerVM versions 7.0.0 and 6.4.6 and below may allow an auth CVE-2021-361718.1The use of a cryptographically weak pseudo-random number generator in the password reset feature of FortiPortal before 6.0.6 may allow a rem CVE-2021-361728.1An improper restriction of XML external entity reference vulnerability in the parser of XML responses of FortiPortal before 6.0.6 may allow CVE-2021-361738.8A heap-based buffer overflow in the firmware signature verification function of FortiOS versions 7.0.1, 7.0.0, 6.4.0 through 6.4.6, 6.2.0 th CVE-2021-361747.5A memory allocation with excessive size value vulnerability in the license verification function of FortiPortal before 6.0.6 may allow an at CVE-2021-361755.4An improper neutralization of input vulnerability [CWE-79] in FortiWebManager versions 6.2.3 and below, 6.0.2 and below may allow a remote a CVE-2021-361766.1Multiple uncontrolled resource consumption vulnerabilities in the web interface of FortiPortal before 6.0.6 may allow a single low-privilege CVE-2021-361774.3An improper access control vulnerability [CWE-284] in FortiAuthenticator HA service 6.3.2 and below, 6.2.x, 6.1.x, 6.0.x may allow an attack