What is CVE-2022-33871?

CVE-2022-33871 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Stack-based Buffer Overflow. CVSS score: 6.6/10. Published 2023-02-16.

How severe is CVE-2022-33871?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Buffer overflow in Fortinet Fortiweb

CVE-2022-33871

A stack-based buffer overflow vulnerability [CWE-121] in FortiWeb version 7.0.1 and earlier, 6.4 all versions, version 6.3.19 and earlier may allow a privileged attacker to execute arbitrary code or commands via specifically crafted CLI `execute backup-local rename` and `execute backup-local show` operations.

Vulnerability class: Buffer Overflow

Published 2023-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Fortinet Fortiweb — versions 6.4.0, 7.0.1, 6.4.1

Weakness classification (CWE)

References

fortiguard.com/psirt/FG-IR-22-164 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2022-33871?: CVE-2022-33871 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Stack-based Buffer Overflow. CVSS score: 6.6/10. Published 2023-02-16.
How severe is CVE-2022-33871?: Medium severity. CVSS v3 base score is 6.6 out of 10.