Weak authentication in Microsoft Office SharePoint allows an unauthorized attacker to bypass a security feature over a network.
[POC] CVE-2026-55040 — CVE-2026-55040
Microsoft SharePoint JWT Authentication Bypass (CVE-2026-55040)
[POC] CVE-2026-55040 — CVE-2026-55040
Exploit code for CVE-2026-55040, it can create auth header for any validate account.
PoC: mssharepoint-scanner
A scanner for CVE-2026-55040 and CVE-2026-63520, designed to determine whether the server is affected by these two CVEs.
PoC: CVE-2026-55040-Mass-Exploit
CVE-2026-55040
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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