CVE-2021-43066

mediumpriority · track · 31EPSS 0.002 · 13 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.22% (13th) EPSS

CVSS 4.6 · medium

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A external control of file name or path in Fortinet FortiClientWindows version 7.0.2 and below, version 6.4.6 and below, version 6.2.9 and below, version 6.0.10 and below allows attacker to escalate privilege via the MSI installer.

cvss

Technical severity, 0–10. One row per scoring source.

8.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–8.4

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.18.4highAV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.4highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/E:H/RL:U/RC:Csecondary · ENISA EU

v3.18.4highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:Hsecondary · psirt@fortinet.comexploitability 2 · impact 5.8

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-668USprimaryCWE-426USCWE-668USCWE-73US

affected products (7)

Products and version ranges known to be affected.

Fortinet Fortinet FortiClientWindows≤ FortiClientWindows 7.0.2 7.0.1, 7.0.0, 6.4.6, 6.4.5, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 6.0.10, 6.0.9, 6.0.8, 6.0.7, 6.0.6, 6.0.5, 6.0.4, 6.0.3, 6.0.2, 6.0.1, 6.0.0enisa_euvdEU
Fortinet Inc. FortiClient Windows6.0 → 6.0.9fstec_bduRU
Fortinet Inc. FortiClient Windows6.2 → 6.2.9fstec_bduRU
Fortinet Inc. FortiClient Windows6.4.0 → 6.4.6fstec_bduRU
Fortinet Inc. FortiClient Windows7.0.0 → 7.0.2fstec_bduRU
fortinet forticlient6.0.0 → 6.4.7nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
fortinet forticlient7.0.0 → 7.0.3nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2022-05-11modified 2026-06-17

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+944 more

references (7)

External citations — patches, advisories, analysis.

scry

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