Vulnerability record/PUBLISHED/Published Nov 10, 2026 18:22:23 UTC

CVE-2026-123390

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

Base score8.8/ 10

SeverityHighCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityHigh

Attack vectorNetworkAV

Attack complexityLowAC

Privileges requiredLowPR

User interactionNoneUI

ScopeUnchangedS

Confidentiality impactHighC

Integrity impactHighI

Availability impactHighA

Exploit maturityUnprovenE

CVSS vector stringCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authoritymicrosoft

Last updatedNov 11, 2026 17:17:54 UTC

PublishedNov 10, 2026 18:22:23 UTC

ReservedNov 5, 2026 21:53:37 UTC