What is CVE-2021-36166?

CVE-2021-36166 is a critical-severity vulnerability in Fortinet Fortimail, classified under Use of Insufficiently Random Values. CVSS score: 9.8/10. Published 2022-03-01.

How severe is CVE-2021-36166?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Fortinet Fortimail

CVE-2021-36166

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.

EPSS: 0.014 (70.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortimail — versions 7.0.0
Fortinet Fortimail — versions FortiMail before 7.0.1

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

psirt@fortinet.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-36166?: CVE-2021-36166 is a critical-severity vulnerability in Fortinet Fortimail, classified under Use of Insufficiently Random Values. CVSS score: 9.8/10. Published 2022-03-01.
How severe is CVE-2021-36166?: Critical severity. CVSS v3 base score is 9.8 out of 10.