CVE-2026-71407: Execute unauthorized code or commands in Fortinet FortiOS
CVE-2026-71407 is a stack-based buffer overflow vulnerability in Fortinet FortiOS versions 7.6.1 through 7.6.6. It allows an unauthenticated attacker to execute arbitrary code or commands in the context of the WAD daemon if explicit proxy is configured with Kerberos authentication and SOCKS enabled. The vulnerability requires bypassing stack protection and ASLR. A fix is available from the vendor.
AI Analysis
Technical Summary
This vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 involves a stack-based buffer overflow that may permit unauthenticated remote code execution via crafted sockets targeting the WAD daemon. Exploitation requires the explicit proxy to be configured with Kerberos authentication and SOCKS enabled, and the attacker must bypass stack protection and ASLR. The vulnerability has a CVSS 3.1 base score of 5.1 (medium severity). An official fix is available from Fortinet.
Potential Impact
Successful exploitation could allow an unauthenticated attacker to execute arbitrary code or commands with the privileges of the WAD daemon, potentially leading to partial confidentiality, integrity, and availability impacts. However, exploitation requires specific proxy configurations and bypassing security protections, limiting the attack surface.
Mitigation Recommendations
An official fix is available from Fortinet and should be applied to affected FortiOS versions. Administrators should update FortiOS to a patched version to remediate this vulnerability.
CVE-2026-71407: Execute unauthorized code or commands in Fortinet FortiOS
Description
CVE-2026-71407 is a stack-based buffer overflow vulnerability in Fortinet FortiOS versions 7.6.1 through 7.6.6. It allows an unauthenticated attacker to execute arbitrary code or commands in the context of the WAD daemon if explicit proxy is configured with Kerberos authentication and SOCKS enabled. The vulnerability requires bypassing stack protection and ASLR. A fix is available from the vendor.
CVSS v3.1
Score 5.1medium
Affected software
cpe:2.3:a:fortinet:fortiproxy:7.6.4:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.3:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.2:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.1:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.4.11:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 involves a stack-based buffer overflow that may permit unauthenticated remote code execution via crafted sockets targeting the WAD daemon. Exploitation requires the explicit proxy to be configured with Kerberos authentication and SOCKS enabled, and the attacker must bypass stack protection and ASLR. The vulnerability has a CVSS 3.1 base score of 5.1 (medium severity). An official fix is available from Fortinet.
Potential Impact
Successful exploitation could allow an unauthenticated attacker to execute arbitrary code or commands with the privileges of the WAD daemon, potentially leading to partial confidentiality, integrity, and availability impacts. However, exploitation requires specific proxy configurations and bypassing security protections, limiting the attack surface.
Mitigation Recommendations
An official fix is available from Fortinet and should be applied to affected FortiOS versions. Administrators should update FortiOS to a patched version to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- fortinet
- Date Reserved
- 2026-08-06T12:21:12.061Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 6a7c6a15bf8831d5398b3615
Added to database: 08/12/2026, 12:41:57 UTC
Last enriched: 08/12/2026, 12:58:27 UTC
Last updated: 08/12/2026, 13:30:16 UTC
Views: 13
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