Vulnerability in Fortinet Antivirus Engine
CVE-2022-26122
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Fortinet Antivirus Engine — versions 0.4.23, 2.0.49, 2.0.60
- Fortinet Fortimail — versions 4.1.0
- Fortinet Av Engine, Fortimail, Fortios, Forticlient — versions AV Engine version 6.2.168 and below and version 6.4.274 and below.
- Fortinet Fortios — versions 7.2.0
Weakness classification (CWE)
References
- fortiguard.com/psirt/FG-IR-22-074 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-26122?
- CVE-2022-26122 is a medium-severity vulnerability in Fortinet Antivirus Engine, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.7/10. Published 2022-11-02.
- How severe is CVE-2022-26122?
- Medium severity. CVSS v3 base score is 4.7 out of 10.