Medium [CVE-2026-71407] Stack buffer overflow in WAD
This medium-severity Fortinet advisory covers CVE-2026-71407 affecting FortiOS.
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Summary
CVSSv3 Score:
5.1
A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiOS explicit proxy 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.
Revised on 2026-08-12 00:00:00
- FortiOS 7.6: 7.6.1 through 7.6.6
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
- FortiOS 7.6: 7.6.7
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Upgrade per the Affected/Solution table: FortiOS 7.6: 7.6.7.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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