CVE-2026-45659
Microsoft SharePoint Remote Code Execution Vulnerability
Vexday Risk Score
41Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 8.8EPSS 2.8%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado
Lifecycle
22 May 2026Published on NVD
27 May 2026Public PoC
Recommendation: Plan a near-term fix — a public PoC already exists.
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft SharePoint Enterprise Server 2016Microsoft · Microsoft SharePoint Server 2019Microsoft · Microsoft SharePoint Server Subscription Editionpublic PoCs found — 3
githubgithub.com/HORKimhab/CVE-2026-45659★ 0githubgithub.com/mistbarbarianspot/CVE-2026-45659-SharePoint-RCE★ 0githubgithub.com/jenniferreire26/CVE-2026-45659★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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