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CVE-2026-66805

8.8 high SSVC exploitation: none Analyzed
NVD · CVE.org

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 4

  1. Cpes+3 CPE criteria (now 3)NVD modified 2026-10-21 21:18
  2. StatusPublished → AnalyzedNVD modified 2026-10-21 21:18
  3. CVSS8.8 (v3.1, 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) → 8.8 (v3.1, CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-21 21:18
  4. First seenCVSS 8.8 · microsoftNVD modified 2026-10-21 20:54

Affected (CPE criteria) 3

  • cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
  • cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
  • cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*

References 1