How severe is CVE-2021-22131?

CVE-2021-22131 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2021-22131 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22131?

CVE-2021-22131 primarily affects Fortinet Fortitoken Mobile. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22131?

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

When was CVE-2021-22131 published?

CVE-2021-22131 was published on 2022-07-18 and last updated on 2026-06-17.

CVE-2021-22131

CVE-2021-22131 is a medium-severity vulnerability in Fortinet Fortitoken Mobile with a CVSS 3.x base score of 6.4. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Fortinet Fortitoken Mobile
Published: 2022-07-18
Last modified: 2026-06-17

Description

A improper validation of certificate with host mismatch in Fortinet FortiTokenAndroid version 5.0.3 and below, Fortinet FortiTokeniOS version 5.2.0 and below, Fortinet FortiTokenWinApp version 4.0.3 and below allows attacker to retrieve information disclosed via man-in-the-middle attacks.

Frequently asked questions

What is CVE-2021-22131?: A improper validation of certificate with host mismatch in Fortinet FortiTokenAndroid version 5.0.3 and below, Fortinet FortiTokeniOS version 5.2.0 and below, Fortinet FortiTokenWinApp version 4.0.3 and below allows attacker to retrieve information disclosed via man-in-the-middle attacks.
How severe is CVE-2021-22131?: CVE-2021-22131 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2021-22131 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22131?: CVE-2021-22131 primarily affects Fortinet Fortitoken Mobile. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22131?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22131 published?: CVE-2021-22131 was published on 2022-07-18 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-21-024

Affected products (30)

cpe:2.3:a:fortinet:fortitoken_mobile:0.4.10:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:0.4.20:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.0:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.0:*:*:*:*:windows:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.1:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.1:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.1:*:*:*:*:windows:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.2:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.2:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.3:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.3:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.4:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.4:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:3.0.5:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.0.0:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.0.1:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.0.3:*:*:*:*:windows:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.1.0:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.1.1:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.1.1:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.2.0:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.2.1:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.2.2:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.3.0:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.3.0:*:*:*:*:ios:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.4.0:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:4.5.0:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:5.0.2:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:5.0.3:*:*:*:*:android:*:*
cpe:2.3:a:fortinet:fortitoken_mobile:5.2.0:*:*:*:*:ios:*:*

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