What is CVE-2026-71407?

CVE-2026-71407 is a medium-severity vulnerability in Fortinet Fortios, classified under Stack-based Buffer Overflow. CVSS score: 5.6/10. Published 2026-08-12.

How severe is CVE-2026-71407?

Medium severity. CVSS v3 base score is 5.6 out of 10.

Buffer overflow in Fortinet Fortios

CVE-2026-71407

A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 may allow an unauthenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Fortinet Fortios — versions 7.6.1
Fortinet Fortipam — versions 1.8.0, 1.7.0, 1.6.0
Fortinet Fortiproxy — versions 7.6.0, 7.4.0, 7.2.0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

psirt@fortinet.com

Frequently asked questions

What is CVE-2026-71407?: CVE-2026-71407 is a medium-severity vulnerability in Fortinet Fortios, classified under Stack-based Buffer Overflow. CVSS score: 5.6/10. Published 2026-08-12.
How severe is CVE-2026-71407?: Medium severity. CVSS v3 base score is 5.6 out of 10.