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Security Advisory; NCSC-2026-0489 [1.0.0]
- Security Advisory
- NCSC-2026-0489 [1.0.0]
- Publicatie
- 12-11-2026 13:04 (Europe/Amsterdam)
- Prioriteit
- Normaal
- Betreft
- Kwetsbaarheden verholpen in Fortinet FortiOS
Kenmerken
- Path Traversal: '../filedir'
- Stack-based Buffer Overflow
- Out-of-bounds Read
- Numeric Truncation Error
- Improper Certificate Validation
- Authentication Bypass by Primary Weakness
- Missing Authentication for Critical Functionality
Omschrijving
Fortinet heeft meerdere kwetsbaarheden verholpen in FortiOS.
Verschillende kwetsbaarheden in FortiOS en andere Fortinet-producten kunnen leiden tot ongeoorloofde toegang, netwerkstoringen of volledige overname.
- SSLVPN: onderscheppen van verkeer door gebrekkige certificaatcontrole.
- Beheerinterface: verkrijgen van verhoogde rechten via een ongeldig token.
- OSPF: manipuleren van routinginformatie zonder in te loggen.
- iBGP: onverwacht routinggedrag door foutieve verwerking van gegevens.
- SSH: omzeilen van authenticatie met gemanipuleerde aanmeldgegevens.
- Geheugenfout: uitvoeren van code door een aanvaller met bestaande rechten.
- WAD: laten vastlopen van proxy- en ZTNA-verbindingen.
- HA FGSP: verkrijgen van volledige beheerderscontrole zonder account, bij bepaalde instellingen.
Oplossingen
Fortinet heeft updates uitgebracht om de kwetsbaarheden in FortiOS te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Referenties
- https://fortiguard.fortinet.com/psirt/FG-IR-26-193
- https://fortiguard.fortinet.com/psirt/FG-IR-26-195
- https://fortiguard.fortinet.com/psirt/FG-IR-26-267
- https://fortiguard.fortinet.com/psirt/FG-IR-26-268
- https://fortiguard.fortinet.com/psirt/FG-IR-26-269
- https://fortiguard.fortinet.com/psirt/FG-IR-26-270
- https://fortiguard.fortinet.com/psirt/FG-IR-26-272
- https://fortiguard.fortinet.com/psirt/FG-IR-26-273
CVE's
- CVE-2026-121528 - CVSS (v3) 8.1
- CVE-2026-121530 - CVSS (v3) 6.6
- CVE-2026-126253 - CVSS (v3) 9.3
- CVE-2026-126254 - CVSS (v3) 9.6
- CVE-2026-126255 - CVSS (v3) 7.4
- CVE-2026-126256 - CVSS (v3) 7.4
- CVE-2026-126258 - CVSS (v3) 7.5
- CVE-2026-126259 - CVSS (v3) 9.8
Producten
Fortinet
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.