Insufficient verification of data authenticity in Fortinet AV Engine
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-26122 |
| CWE-ID | CWE-345 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
AV engine Hardware solutions / Firmware Fortinet FortiMail Server applications / IDS/IPS systems, Firewalls and proxy servers FortiOS Operating systems & Components / Operating system |
| Vendor | Fortinet, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Insufficient verification of data authenticity
EUVDB-ID: #VU68929
Risk: Medium
CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-26122
CWE-ID:
CWE-345 - Insufficient Verification of Data Authenticity
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to insufficient verification of data authenticity. A remote attacker can bypass the AV engine via manipulating MIME attachment with junk and pad characters in base64.
MitigationInstall updates from vendor's website.
Vulnerable software versionsAV engine: 0.4.23 - 6.253
Fortinet FortiMail: 6.0.0 - 7.0.2
FortiOS: 6.0.0 - 7.2.0
External linkshttp://fortiguard.fortinet.com/psirt/FG-IR-22-074
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
