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CVE-2022-26122

MEDIUM · CVSS 4.7EPSS 0.5%EU EUVD

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.

Key facts

CVSS score
4.7 (v3.1)
Severity
MEDIUM
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Weakness (CWE)
CWE-345
EPSS score
0.5% (41th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2022-30689)
Published
November 2, 2022
NVD last modified
June 17, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-30689 in the EU Vulnerability Database. Last updated in EUVD on October 22, 2024.

View on the EU Vulnerability Database

Affected products

  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / antivirus engine
  • fortinet / fortimail
  • fortinet / fortimail
  • fortinet / fortios
  • fortinet / fortios

Certified products that may be affected

4 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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