CVE-2021-41028

mediumpriority · track · 30OT risk · elevatedEPSS 0.002 · 14 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.23% (14th) EPSS

CVSS 5.4 · medium

Is it mine?

18 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A combination of a use of hard-coded cryptographic key vulnerability [CWE-321] in FortiClientEMS 7.0.1 and below, 6.4.6 and below and an improper certificate validation vulnerability [CWE-297] in FortiClientWindows, FortiClientLinux and FortiClientMac 7.0.1 and below, 6.4.6 and below may allow an unauthenticated and network adjacent attacker to perform a man-in-the-middle attack between the EMS and the FCT via the telemetry protocol.

cvss

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

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.4–8.2

v2.05.4mediumAV:A/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 5.5 · impact 6.4

v3.17.5highCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.6 · impact 5.9

v3.18.2highAV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.2highCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H/E:F/RL:U/RC:Csecondary · ENISA EU

v3.18.2highCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:Hsecondary · psirt@fortinet.comexploitability 1.6 · impact 6

v3.16.9mediumCVSS:3.1/AV:A/AC:H/PR:N/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-295USprimaryCWE-798USprimaryCWE-295USCWE-321USCWE-798US

affected products (18)

Products and version ranges known to be affected.

Fortinet Fortinet FortiClientEMS, FortiClientWindows, FortiClientLinux, FortiClientMac≤ FortiClientEMS 7.0.1 and below, 6.4.6 and below, FortiClientWindows, FortiClientLinux, FortiClientMac 7.0.1 and below, 6.4.6 and below.enisa_euvdEU
Fortinet Inc. FortiClient Windows≤ 6.4.6fstec_bduRU
Fortinet Inc. FortiClient Windows≤ 7.0.1fstec_bduRU
Fortinet Inc. FortiClient for Linux≤ 6.4.6fstec_bduRU
Fortinet Inc. FortiClient for Linux≤ 7.0.1fstec_bduRU
Fortinet Inc. FortiClientEMS≤ 7.0.1fstec_bduRU
Fortinet Inc. FortiClientEMS≤ 6.4.6fstec_bduRU
Fortinet Inc. FortiClientMac≤ 6.4.6fstec_bduRU
Fortinet Inc. FortiClientMac≤ 7.0.1fstec_bduRU
fortinet forticlient6.0.0 → 6.0.9nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
fortinet forticlient6.2.0 → 6.2.9nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
fortinet forticlient6.4.0 → 6.4.6nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
fortinet forticlient= 7.0.0nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
fortinet forticlient= 7.0.1nvdUScpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
fortinet forticlient endpoint management server6.2.0 → 6.2.9nvdUScpe:2.3:a:fortinet:forticlient_endpoint_management_server:*:*:*:*:*:*:*:*
fortinet forticlient endpoint management server6.4.0 → 6.4.6nvdUScpe:2.3:a:fortinet:forticlient_endpoint_management_server:*:*:*:*:*:*:*:*
fortinet forticlient endpoint management server= 7.0.0nvdUScpe:2.3:a:fortinet:forticlient_endpoint_management_server:*:*:*:*:*:*:*:*
fortinet forticlient endpoint management server= 7.0.1nvdUScpe:2.3:a:fortinet:forticlient_endpoint_management_server:*:*:*:*:*:*:*:*

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 2021-12-16modified 2026-06-17

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+4169 more

references (5)

External citations — patches, advisories, analysis.

scry

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