CVE-2026-66808
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.8
- CVSS vector
- 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
- EPSS probability
- 1.10%
- CWE
- CWE-502
- Published
- 2026-08-11
- Last modified
- 2026-09-16
Affected products
- Microsoft Microsoft SharePoint Enterprise Server 2016
- Microsoft Microsoft SharePoint Server 2019
- Microsoft Microsoft SharePoint Server Subscription Edition