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 of the WAD daemon via crafted sockets, only if the explicit proxy is configured with Kerberos authentication and SOCKS enabled.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (33.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.004 · change: -0.001
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)
References
- fortiguard.fortinet.com/psirt/FG-IR-26-161 (Vendor Advisory)
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.