Multiple critical vulnerabilities in SolarWinds Serv-U, including improper privilege management and authorization bypass flaws, allow attackers with administrative access to execute arbitrary code with elevated privileges. These vulnerabilities carry a CVSS 3.1 score of 9.1 (CRITICAL) and affect Serv-U versions prior to 15.5.4. The fix requires an immediate upgrade to Serv-U version 15.5.4.
Beveiligingsadviezen Download Beveilingsadvies; NCSC-2026-0069 [1.0.0] Beveiligingsadvies NCSC-2026-0069 [1.0.0] Publicatie 25-02-2026 11:39 (Europe/Amsterdam) Prioriteit Normaal Betreft Kwetsbaarheden verholpen in SolarWinds Serv-U Kenmerken Improper Privilege Management Authorization Bypass Through User-Controlled Key Incorrect Type Conversion or Cast Omschrijving SolarWinds heeft kwetsbaarheden verholpen in Serv-U. De kwetsbaarheden bevinden zich in de wijze waarop Serv-U toegang controleert en gegevens types verwerkt. Aanvallers met administratieve privileges kunnen deze kwetsbaarheden misbruiken om ongeautoriseerde systeemtoegang te verkrijgen en willekeurige code met verhoogde rechten uit te voeren. Dit kan leiden tot privilege-escalatie. Oplossingen Solarwinds heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie. Referenties https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4_release_notes.htm CVE's CVE-2025-40538 - CVSS (v4) 8.6 CVE-2025-40539 - CVSS (v4) 8.6 CVE-2025-40540 - CVSS (v4) 8.6 CVE-2025-40541 - CVSS (v4) 8.6 Producten SolarWinds Serv-U 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.