What is CVE-2021-24022?

CVE-2021-24022 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.7/10. Published 2021-07-20.

How severe is CVE-2021-24022?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Fortinet Fortianalyzer

CVE-2021-24022

A buffer overflow vulnerability in FortiAnalyzer CLI 6.4.5 and below, 6.2.7 and below, 6.0.x and FortiManager CLI 6.4.5 and below, 6.2.7 and below, 6.0.x may allow an authenticated, local attacker to perform a Denial of Service attack by running the `diagnose system geoip-city` command with a large ip value.

Vulnerability class: Buffer Overflow

Published 2021-07-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (11.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Fortinet Fortianalyzer
Fortinet Fortimanager
Fortinet Fortianalyzer, Fortimanager — versions FortiAnalyzer 6.4.5 and below, 6.2.7 and below, 6.0.x; FortiManager 6.4.5 and below, 6.2.7 and below, 6.0.x

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

fortiguard.com/advisory/FG-IR-20-194 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-24022?: CVE-2021-24022 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.7/10. Published 2021-07-20.
How severe is CVE-2021-24022?: Medium severity. CVSS v3 base score is 6.7 out of 10.