How severe is CVE-2021-32593?

CVE-2021-32593 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-32593 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32593?

CVE-2021-32593 affects Fortinet Fortiwan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32593?

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

When was CVE-2021-32593 published?

CVE-2021-32593 was published on 2022-04-06 and last updated on 2026-06-17.

CVE-2021-32593

CVE-2021-32593 is a medium-severity vulnerability in Fortinet Fortiwan with a CVSS 3.x base score of 6.5. 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-327.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.4
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-327
Affected product: Fortinet Fortiwan
Published: 2022-04-06
Last modified: 2026-06-17

Description

A use of a broken or risky cryptographic algorithm vulnerability [CWE-327] in the Dynamic Tunnel Protocol of FortiWAN before 4.5.9 may allow an unauthenticated remote attacker to decrypt and forge protocol communication messages.

Frequently asked questions

What is CVE-2021-32593?: A use of a broken or risky cryptographic algorithm vulnerability [CWE-327] in the Dynamic Tunnel Protocol of FortiWAN before 4.5.9 may allow an unauthenticated remote attacker to decrypt and forge protocol communication messages.
How severe is CVE-2021-32593?: CVE-2021-32593 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-32593 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32593?: CVE-2021-32593 affects Fortinet Fortiwan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32593?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-32593 published?: CVE-2021-32593 was published on 2022-04-06 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-21-070

Affected products (1)

cpe:2.3:a:fortinet:fortiwan:*:*:*:*:*:*:*:*

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