Description
Out-of-bounds read in Microsoft Office Access allows an unauthorized attacker to disclose information over a network.
Published: 2026-10-13
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Patch
AI Analysis

Impact

The vulnerability is an out-of-bounds read bug in Microsoft Office Access that enables an attacker to read memory regions outside the intended bounds. This flaw results in the disclosure of internal data over a network, exposing sensitive information to unauthorized users. The flaw is a classic example of a buffer read error that can leak private data if triggered.

Affected Systems

Affected products include Microsoft 365 Apps for Enterprise, Microsoft Office LTSC 2021, and Microsoft Office LTSC 2024. No specific patch versions are listed in the data, so any installation of these products that has not received the latest security update is vulnerable.

Risk and Exploitability

The CVSS score of 6.5 indicates a moderate severity. EPSS is not available, and the vulnerability is not listed in the CISA KEV catalog, suggesting that large-scale exploitation is not yet documented. The likely attack vector is remote: an attacker could send a crafted Office file or trigger the read over a network connection, especially if Office is run with sufficient privileges. The flaw does not provide privilege escalation, but the information disclosure could compromise confidentiality of corporate or personal data contained in Office documents.

Generated by OpenCVE AI on October 17, 2026 at 05:08 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Ensure that all installations of Microsoft 365 Apps for Enterprise, Microsoft Office LTSC 2021, and Microsoft Office LTSC 2024 receive the latest security updates released by Microsoft
  • If a patch is not yet available, isolate the vulnerable Office applications by applying network segmentation and restricting access to them from untrusted networks
  • Enable detailed logging and monitoring of Office processes so that anomalous read attempts can be detected and investigated promptly

Generated by OpenCVE AI on October 17, 2026 at 05:08 UTC.

Tracking

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Advisories

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History

Sun, 25 Oct 2026 03:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft microsoft Office Ltsc 2021
Microsoft microsoft Office Ltsc 2024
Vendors & Products Microsoft microsoft Office Ltsc 2021
Microsoft microsoft Office Ltsc 2024

Thu, 15 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*

Wed, 14 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Out-of-bounds read in Microsoft Office Access allows an unauthorized attacker to disclose information over a network.
Title Microsoft Office Access Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft office 2021
Microsoft office 2024
Weaknesses CWE-125
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 2021
Microsoft office 2024
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}


Subscriptions

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

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-31T18:00:39.225Z

Reserved: 2026-09-21T18:23:52.965Z

Link: CVE-2026-94506

cve-icon Vulnrichment

Updated: 2026-10-13T19:49:20.863Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-13T19:21:44.070

Modified: 2026-10-15T15:21:29.497

Link: CVE-2026-94506

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-25T02:15:04Z

Weaknesses