CVE-2022-26122 json
An insufficient verification of data authenticity vulnerability [CWE-345] in FortiClient, FortiMail and FortiOS AV engines version 6.2.168…
published 2022-11-02 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-30689
- cvss
- 4.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- fortiguard.com/psirt/FG-IR-22-074 advisory
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:P/RL:U/RC:R |
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N |
| NVD | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
Affected products
- Fortinet Fortinet AV Engine, FortiMail, FortiOS, FortiClient
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
- Technology feeds
References
-
fortiguard.com
/psirt/FG-IR-22-074
patch, vendor-advisory
Sources
- CVE List CVE-2022-26122
- NVD CVE-2022-26122
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