Fortinet
CVE-2026-126151: A incorrect implementation of authentication algorithm vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 t
CVE-2026-126151 Nov 11, 2026 Source: Vendor
In brief. Fortinet published CVE-2026-126151: A incorrect implementation of authentication algorithm vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 t on November 11, 2026. It credits 1 researcher or team for 1 CVE.
A incorrect implementation of authentication algorithm vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow an unauthenticated remote attacker to gain elevation of privilege (account takeover) via a crafted request.
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-126151
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Credited
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Credited as Gwendal Guegniaud of the Fortinet Product Security team with the use of the frontier AI model: Claude Mythos