8.6

CVE-2022-26122: fortinet antivirus_engine

CVSS: 8.6v3.1HighModified
Published 02-11-2022Last modified 22-10-2024
Open JSON

Vulnerability summary

CVE-2022-26122 is a high (CVSS 8.6) vulnerability in fortinet antivirus_engine. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.7% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (NVD)
EPSS score
0.50%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-11-2022
    PublishedVulnerability first disclosed.
  2. 22-10-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

+0.02 pp

From 0.48% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet4 products
  • antivirus_engine0.4.23 | 2.0.49 | 2.0.60 | 4.4.54 | 6.33 | 6.137 | 6.142 | 6.144 | 6.145 | 6.156 | 6.157 | 6.243 | 6.252 | 6.253
  • fortimail≥ 6.0.0, ≤ 6.0.12 | ≥ 6.2.0, ≤ 6.2.9 | ≥ 6.4.0, ≤ 6.4.6 | ≥ 7.0.0, ≤ 7.0.2 | 4.1.0
  • fortinet av engine, fortimail, fortios, forticlientAV Engine version 6.2.168 and below and version 6.4.274 and below.
  • fortiosEOL≥ 6.0.0, ≤ 6.0.15 | ≥ 6.2.0, ≤ 6.2.11 | ≥ 6.4.0, ≤ 6.4.10 | ≥ 7.0.0, ≤ 7.0.6 | 7.2.0

1 vendor · 4 products

References

1 links