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CRITICAL · 9.8

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 cer...

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
FortinetFortimail<= 5.4.12

Related Weaknesses (CWE)

CWE-330

References

FAQ

What is CVE-2021-36166?

CVE-2021-36166 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 cer...

How severe is CVE-2021-36166?

CVE-2021-36166 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-36166?

Check the references section above for vendor advisories and patch information. Affected products include: Fortinet Fortimail.