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VULNERABILITIES

CVE-2026-100209 Details

Description

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100209 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After Free[email protected]

Affected Products

ProductVersions
microsoft 365 apps
All versions

CPE

  • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
  • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*

Remediation

  • No remediation found in references.
microsoft microsoft 365
All versions

CPE

  • cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*

Remediation

  • No remediation found in references.
microsoft office 2021
All versions

CPE

  • cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*

Remediation

  • No remediation found in references.
microsoft office 2024
All versions

CPE

  • cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
  • cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
  • cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-100209
NVD Published Date:
Oct 13, 2026
NVD Last Modified:
Oct 15, 2026
Source:
[email protected]
CVE-2026-100209 Details - Not Deferred