Vulnerability

CVE-2026-58644

Descriptive record received from OpenCTI and minimised for consultation in the Intel portal.

Sharing: TLP:CLEAR
Confidence: 100
Source: Cybersecurity and Infrastructure Security Agency
Updated: 26/09/2026 02:59

Description

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

STIX identifiervulnerability--762c357e-96d0-5dfb-b7cd-8e77a5e7cf25

First observation-

Last observation-

Known relationships9

Aliases and classifications

CWE-502Deserialization of Untrusted Data

Minimised technical details

No raw data

cvss score: 9.8
cvss vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
cvss severity: CRITICAL
cisa kev: True

Provenance

Public references

Microsoft SharePoint Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58644

EudorIA correlation

Intel catalogue

The vulnerability is also available in the EudorIA editorial catalogue.

Open EudorIA analysis

Presence in OpenCTI describes an intelligence correlation and does not, by itself, constitute evidence of compromise, legal attribution or operational guidance applicable without context verification.