A critical improper access control vulnerability (CVE-2026-44277, CVSS 9.8) in Fortinet FortiAuthenticator allows an attacker to execute unauthorized code or commands to gain elevated privileges. The vulnerability stems from insufficient access restrictions within the software. Fortinet has released updates to address the issue, and users should refer to the vendor's PSIRT advisory (FG-IR-26-128) for specific affected and patched version information.
Beveiligingsadviezen Download Beveilingsadvies; NCSC-2026-0156 [1.0.0] Beveiligingsadvies NCSC-2026-0156 [1.0.0] Publicatie 13-05-2026 13:39 (Europe/Amsterdam) Prioriteit Normaal Betreft Kwetsbaarheid verholpen in Fortinet FortiAuthenticator Kenmerken Improper Access Control Omschrijving Fortinet heeft een kwetsbaarheid verholpen in FortiAuthenticator. De kwetsbaarheid betreft een onjuiste access control in FortiAuthenticator, waardoor een aanvaller ongeautoriseerde code of commando's kan uitvoeren. Dit ontstaat door onvoldoende beperkingen in de toegangscontrole binnen de software. Een aanvaller kan hierdoor verhoogde privileges verkrijgen en willekeurige acties op het systeem uitvoeren. Oplossingen Fortinet heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Zie bijgevoegde referenties voor meer informatie. Referenties https://fortiguard.fortinet.com/psirt/FG-IR-26-128 CVE's CVE-2026-44277 - CVSS (v3) 9.8 Producten Fortinet FortiAuthenticator Disclaimer The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.