Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.
VOLERION
Volerion Security Research

NOT DEFERRED DATABASE

VULNERABILITIES

CVE-2026-55133 Details

Description

Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code locally.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/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-2026-55133 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-122Heap-based Buffer Overflow[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:macos:-:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-55133
NVD Published Date:
Jul 14, 2026
NVD Last Modified:
Jul 22, 2026
Source:
[email protected]