What is CVE-2026-50399?
CVE-2026-55040 is a weak authentication vulnerability in Microsoft SharePoint that allows an unauthorized attacker to bypass a security feature over a network. This vulnerability has been added to the KEV catalog, indicating active exploitation and requires immediate patching.
Azərbaycanca: CVE-2026-55040 Microsoft SharePoint-də zəif autentifikasiya zəifliyidir ki, şəbəkə üzərindən icazəsiz hücumçuya təhlükəsizlik funksiyasını keçməyə imkan verir. Bu zəiflik KEV kataloquna əlavə edilib, yəni aktiv istismar olunur və təcili yeniləmə tələb edir.
Related CVEs
link basis: same weakness class CWE-287; shared vendor: Microsoft
FAQ2
Is the CVE-2026-55040 Microsoft SharePoint vulnerability being actively exploited?
Yes, CVE-2026-55040 has been added to the KEV catalog, which indicates it is being actively exploited.
What is the impact of CVE-2026-55040?
This vulnerability allows an unauthorized attacker to bypass a security feature in Microsoft SharePoint over a network.
See also6
This explainer is AI-written from source data — skopnix's own reporting on this CVE; CVSS scores, vendors and versions are never invented. See NVD for the official record.