Is CVE-2021-36193 being actively exploited?

CVE-2021-36193 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2021-36193?

CVE-2021-36193 has a CVSS 3.1 base score of 6.7 (MEDIUM).

CVE-2021-36193

MEDIUM · CVSS 6.7EPSS 0.8%EU EUVD

Multiple stack-based buffer overflows in the command line interpreter of FortiWeb before 6.4.2 may allow an authenticated attacker to achieve arbitrary code execution via specially crafted commands.

Key facts

CVSS score: 6.7 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
EPSS score: 0.8% (56th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2021-22814)
Published: February 2, 2022
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-22814 in the EU Vulnerability Database. Last updated in EUVD on January 13, 2026.

View on the EU Vulnerability Database

Affected products

fortinet / fortiweb

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

FortiWeb 5.6 - Fortinet, Inc. - FIPS 140 3103 - historical
FortiWeb-3000E/4000E - Fortinet, Inc. - FIPS 140 3104 - historical
Fortinet Fortiweb 5.6 - Fortinet, Inc. - Common Criteria 383-4-425 - archived

References

https://fortiguard.com/advisory/FG-IR-21-132(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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