CVE-2021-41028

HIGH
7.5
CVSS Score
Published: December 16, 2021 at 06:13 PM UTC
Updated: June 17, 2026 at 04:07 AM UTC
3 products affected across 2 vendorsForticlientForticlient Endpoint Management ServerFortiClientEMS

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Severity
HIGH7.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 7.0.16.0.0 ≤ v ≤ 6.0.96.2.0 ≤ v ≤ 6.2.96.4.0 ≤ v ≤ 6.4.67.0.07.0.1
6.2.0 ≤ v ≤ 6.2.96.4.0 ≤ v ≤ 6.4.67.0.07.0.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_CONFIRMVendor Advisory
https://fortiguard.com/advisory/FG-IR-21-075

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295CWE-798

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