What is CVE-2026-84391?

CVE-2026-84391 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under CWE-457. CVSS score: 6.5/10. Published 2026-09-08.

How severe is CVE-2026-84391?

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

Vulnerability in Fortinet Fortianalyzer

CVE-2026-84391

A use of uninitialized variable vulnerability in Fortinet FortiAnalyzer 7.6.3 through 7.6.6 may allow attacker to denial of service via <insert attack vector here>

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.

Affected products

Fortinet Fortianalyzer

Weakness classification (CWE)

CWE-457

References

psirt@fortinet.com

Frequently asked questions

What is CVE-2026-84391?: CVE-2026-84391 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under CWE-457. CVSS score: 6.5/10. Published 2026-09-08.
How severe is CVE-2026-84391?: Medium severity. CVSS v3 base score is 6.5 out of 10.