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CVE-2022-45856An improper certificate validation vulnerability [CWE-295] in FortiClientWindows 6.4 all versions, 7.0.0 through 7.0.7, FortiClientMac 6.4…

Description

An improper certificate validation vulnerability [CWE-295] in FortiClientWindows 6.4 all versions, 7.0.0 through 7.0.7, FortiClientMac 6.4 all versions, 7.0 all versions, 7.2.0 through 7.2.4, FortiClientLinux 6.4 all versions, 7.0 all versions, 7.2.0 through 7.2.4, FortiClientAndroid 6.4 all versions, 7.0 all versions, 7.2.0 and FortiClientiOS 5.6 all versions, 6.0.0 through 6.0.1, 7.0.0 through 7.0.6 SAML SSO feature may allow an unauthenticated attacker to man-in-the-middle the communication between the FortiClient and  both the service provider and the identity provider.

Timeline

  1. ID reserved

    By fortinet

  2. · 22 months later

    Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-45856, by who scored it
Scored byCVSSScoreVector
fortinetCNA (assigner)3.1Medium4.6CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:U/RC:C
NVDNVD · Analyzed3.1Medium5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (exploitation in 30 days)
0.23% · top 86% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.

Affected products

  • Fortinet · FortiClientiOS

    • affected 7.0.3 – ≤ 7.0.6
    • affected 7.0.0 – ≤ 7.0.1
    • affected 6.0.0 – ≤ 6.0.1
    • affected 5.6.5 – ≤ 5.6.6
    • affected 5.6.0 – ≤ 5.6.1
    • affected 5.4.3 – ≤ 5.4.4
    • affected 5.4.0 – ≤ 5.4.1
    • affected 5.2.0 – ≤ 5.2.3
    • affected 5.0.0 – ≤ 5.0.3
    • affected 4.0.0 – ≤ 4.0.2
    • affected 2.0.0 – ≤ 2.0.1

  • Fortinet · FortiClientAndroid

    • affected 7.2.0
    • affected 7.0.6 – ≤ 7.0.7
    • affected 7.0.2 – ≤ 7.0.3
    • affected 7.0.0
    • affected 6.4.6
    • affected 6.4.4
    • affected 6.4.1
    • affected 6.0.0
    • affected 5.6.0
    • affected 5.4.0 – ≤ 5.4.2
    • affected 5.2.0 – ≤ 5.2.8
    • affected 5.0.0 – ≤ 5.0.3

  • Fortinet · FortiClientMac

    • affected 7.2.0 – ≤ 7.2.4
    • affected 7.0.0 – ≤ 7.0.13
    • affected 6.4.0 – ≤ 6.4.10

  • Fortinet · FortiClientLinux

    • affected 7.2.0 – ≤ 7.2.4
    • affected 7.0.0 – ≤ 7.0.13
    • affected 6.4.7 – ≤ 6.4.9
    • affected 6.4.0 – ≤ 6.4.4

  • Fortinet · FortiClientWindows

    • affected 7.0.0 – ≤ 7.0.7
    • affected 6.4.0 – ≤ 6.4.10

What to do

Solution: Please upgrade to FortiClientAndroid version 7.2.1 or above Please upgrade to FortiClientiOS version 7.0.7 or above Please upgrade to FortiClientMac version 7.4.0 or above Please upgrade to FortiClientMac version 7.2.5 or above Please upgrade to FortiClientLinux version 7.4.0 or above Please upgrade to FortiClientLinux version 7.2.5 or above Please upgrade to FortiClientWindows version 7.2.0 or above Please upgrade to FortiClientWindows version 7.0.8 or above

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2022-45856 badge
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Record last updated .