CVE-2021-26091 – FortiMail Cryptographically Weak PRNG Authentication Token Vulnerability

The following table lists the changes that have been made to the
CVE-2021-26091 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Mar. 24, 2025

    Action Type Old Value New Value
    Added Description A use of a cryptographically weak pseudo-random number generator vulnerability in the authenticator of the Identity Based Encryption service of FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to infer parts of users authentication tokens and reset their credentials.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Added CWE CWE-338
    Added Reference https://fortiguard.com/advisory/FG-IR-21-031
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