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Fencer Intel
high 8.2

CVE-2021-41028 json

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 im…

published 4y ago modified 4mo ago also EUVD-2021-28181

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2y ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H/E:F/RL:U/RC:C
CNA 3.1 8.2 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H
NVD 3.1 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.4 AV:A/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Fortinet Fortinet FortiClientEMS, FortiClientWindows, FortiClientLinux, FortiClientMac

Classification

Weakness
  • CWE-295 Improper Certificate Validation
  • CWE-798 Use of Hard-coded Credentials
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.