Fortinet FortiAuthenticator 6.6.0-8.0.3 Infinite Loop DoS via TCP
CVE-2026-126237 Published on November 11, 2026
A loop with unreachable exit condition ('infinite loop') vulnerability in Fortinet FortiAuthenticator 8.0.0 through 8.0.3, FortiAuthenticator 6.6.0 through 6.6.10 may allow an attacker to cause a denial of service via crafted TCP requests.
Vulnerability Analysis
CVE-2026-126237 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an Infinite Loop Vulnerability?
The program contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. If the loop can be influenced by an attacker, this weakness could allow attackers to consume excessive resources such as CPU or memory.
CVE-2026-126237 has been classified to as an Infinite Loop vulnerability or weakness.
Products Associated with CVE-2026-126237
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Affected Versions
Fortinet FortiAuthenticator:- Version 8.0.0, <= 8.0.3 is affected.
- Version 6.6.0, <= 6.6.10 is affected.