CVE-2022-26122 Security feature bypass in Fortinet AV Engine, FortiMail, FortiOS, FortiClient
Attackers can bypass antivirus detection by manipulating MIME attachments with junk characters in base64 encoding.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2022-26122?
CVE-2022-26122 is a medium-severity vulnerability in Fortinet Fortios, published on 2 Nov 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-345
Which versions are affected by CVE-2022-26122?
It affects 3 products.
Products include Fortinet Antivirus Engine, Fortinet Fortimail, Fortinet Fortios.
How do I fix CVE-2022-26122?
No fix has been published for CVE-2022-26122 yet. Limit exposure of the affected software until one is available.
Is CVE-2022-26122 being exploited?
There is no known exploitation of CVE-2022-26122 in the wild and no public exploit code.
Other vulnerabilities in Fortinet Fortios
Sources
Also known as GHSA-8xr5-vrfj-p7x2.