How severe is CVE-2021-36189?

CVE-2021-36189 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-36189 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36189?

CVE-2021-36189 primarily affects Fortinet Forticlient Enterprise Management Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36189?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-36189 published?

CVE-2021-36189 was published on 2021-12-09 and last updated on 2026-06-17.

CVE-2021-36189

CVE-2021-36189 is a medium-severity vulnerability in Fortinet Forticlient Enterprise Management Server with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-311.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 4.0
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-311
Affected product: Fortinet Forticlient Enterprise Management Server
Published: 2021-12-09
Last modified: 2026-06-17

Description

A missing encryption of sensitive data in Fortinet FortiClientEMS version 7.0.1 and below, version 6.4.4 and below allows attacker to information disclosure via inspecting browser decrypted data

Frequently asked questions

What is CVE-2021-36189?: A missing encryption of sensitive data in Fortinet FortiClientEMS version 7.0.1 and below, version 6.4.4 and below allows attacker to information disclosure via inspecting browser decrypted data
How severe is CVE-2021-36189?: CVE-2021-36189 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-36189 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36189?: CVE-2021-36189 primarily affects Fortinet Forticlient Enterprise Management Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36189?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36189 published?: CVE-2021-36189 was published on 2021-12-09 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-21-140

Affected products (4)

cpe:2.3:a:fortinet:forticlient_enterprise_management_server:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlient_enterprise_management_server:6.4.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlient_enterprise_management_server:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlient_enterprise_management_server:7.0.1:*:*:*:*:*:*:*

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