What’s Vulnerable › Vulnerabilities

CVE-2022-26122

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-02 · updated 2026-06-17
• Weakness: CWE-345

Description

An insufficient verification of data authenticity vulnerability [CWE-345] in FortiClient, FortiMail and FortiOS AV engines version 6.2.168 and below and version 6.4.274 and below may allow an attacker to bypass the AV engine via manipulating MIME attachment with junk and pad characters in base64.

Affected products

• Fortinet Antivirus Engine: 0.4.23, 2.0.49, 2.0.60, 4.4.54, 6.33, 6.137 (+8)
• Fortinet FortiMail: from 6.0.0 through 6.0.12; from 6.2.0 through 6.2.9; from 6.4.0 through 6.4.6; from 7.0.0 through 7.0.2; 4.1.0
• Fortinet FortiOS (FortiGate): from 6.0.0 through 6.0.15; from 6.2.0 through 6.2.11; from 6.4.0 through 6.4.10; from 7.0.0 through 7.0.6; 7.2.0

References

• https://fortiguard.com/psirt/FG-IR-22-074
• https://fortiguard.com/psirt/FG-IR-22-074

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