Description
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Published: 2026-06-09
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally. Based on the description, it is inferred that the attack vector is local. The potential impact is local code execution, which can compromise confidentiality, integrity, and availability of the affected system.

Affected Systems

The flaw affects Microsoft 365 Apps for Enterprise, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2021, and Microsoft Office LTSC for Mac 2024. Specific version details are not disclosed in the available CNA data.

Risk and Exploitability

The CVSS score of 7.8 indicates high severity. The EPSS score of <1% points to a very low probability of exploitation in the wild, and the vulnerability is not listed in CISA’s KEV catalog. The use‑after‑free in Word can enable local code execution if an attacker supplies a crafted document; however, the specific exploitation scenario is not detailed in the available data.

Generated by OpenCVE AI on July 21, 2026 at 19:00 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Microsoft Office update that addresses CVE-2026-45486
  • Disable automatic macro execution and set Office security settings to treat external attachments as safe but isolated
  • Limit exposure by only opening documents from trusted sources and consider executing suspicious files in a sandboxed environment

Generated by OpenCVE AI on July 21, 2026 at 19:00 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 08 Jul 2026 23:30:00 +0000

Type Values Removed Values Added
Description Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Thu, 11 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft microsoft 365
Microsoft office 2021
Microsoft office 2024
CPEs cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
Vendors & Products Microsoft microsoft 365
Microsoft office 2021
Microsoft office 2024

Wed, 10 Jun 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 09 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
Description Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Title Microsoft Word Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
Weaknesses CWE-416
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*
cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft 365 Apps Microsoft 365 Office 2021 Office 2024 Office 365 Office Macos 2021 Office Macos 2024
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-15T20:08:51.316Z

Reserved: 2026-05-12T16:07:22.617Z

Link: CVE-2026-45486

cve-icon Vulnrichment

Updated: 2026-06-10T10:32:11.100Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-09T17:17:23.193

Modified: 2026-06-11T18:37:06.820

Link: CVE-2026-45486

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-21T19:15:03Z

Weaknesses