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CVE-2021-26091

Published: Mar 24, 2025Updated: Jul 23, 2025 Sources: CVE List NVD BDUCWE-338
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.3%
Top 80.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-338

Affected Products

fortimailfortinetSecurity Products
FortiMailFortinet Inc.Security Products
FortiMailFortinetSecurity Products
fortinetcommercialUSSecurity Productsaka forti net
fortinet inc.commercialUSNetworking Infrastructureaka fortinet

Exploitability

Official Patch Available

References

https://fortiguard.com/advisory/FG-IR-21-031
fortiguard.com
https://www.fortiguard.com/psirt/FG-IR-21-031
fortiguard.com
https://www.cybersecurity-help.cz/vdb/SB2021071352
cybersecurity-help.cz

Timeline

Published
Mar 24, 2025
Last Updated
Jul 23, 2025

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