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CVE-2022-26122

HIGHCVSS 8.6/10EPSS 0.44%

Last modified

CVE-2022-26122 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

EPSS Probability
0.44%

35.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FortinetAntivirus Engine0.4.23
FortinetAntivirus Engine2.0.49
FortinetAntivirus Engine2.0.60
FortinetAntivirus Engine4.4.54
FortinetAntivirus Engine6.33
FortinetAntivirus Engine6.137
FortinetAntivirus Engine6.142
FortinetAntivirus Engine6.144
FortinetAntivirus Engine6.145
FortinetAntivirus Engine6.156
FortinetAntivirus Engine6.157
FortinetAntivirus Engine6.243
FortinetAntivirus Engine6.252
FortinetAntivirus Engine6.253
FortinetFortimail>= 6.0.0, <= 6.0.12
FortinetFortimail>= 6.2.0, <= 6.2.9
FortinetFortimail>= 6.4.0, <= 6.4.6
FortinetFortimail>= 7.0.0, <= 7.0.2
FortinetFortimail4.1.0
FortinetFortios>= 6.0.0, <= 6.0.15
FortinetFortios>= 6.2.0, <= 6.2.11
FortinetFortios>= 6.4.0, <= 6.4.10
FortinetFortios>= 7.0.0, <= 7.0.6
FortinetFortios7.2.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2022-26122?
CVE-2022-26122 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2022-26122?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-26122?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST