What is CVE-2023-33307?

CVE-2023-33307 is a medium-severity vulnerability in Fortinet Fortios, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2023-06-16.

How severe is CVE-2023-33307?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Fortinet Fortios

CVE-2023-33307

A null pointer dereference in Fortinet FortiOS before 7.2.5 and before 7.0.11, FortiProxy before 7.2.3 and before 7.0.9 allows attacker to denial of sslvpn service via specifically crafted request in network parameter.

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Fortinet Fortios — versions 7.2.0, 7.0.0
Fortinet Fortiproxy — versions 7.2.0, 7.0.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

fortiguard.com/psirt/FG-IR-23-015 (Not Applicable)
exchange.xforce.ibmcloud.com/vulnerabilities/258201 (Third Party Advisory)

Frequently asked questions

What is CVE-2023-33307?: CVE-2023-33307 is a medium-severity vulnerability in Fortinet Fortios, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2023-06-16.
How severe is CVE-2023-33307?: Medium severity. CVSS v3 base score is 6.5 out of 10.