Description
Out-of-bounds read in Microsoft Office Access allows an unauthorized attacker to execute code over a network.
Published: 2026-10-13
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

The vulnerability is an out‑of‑bounds read in Microsoft Office Access that allows an unauthorized attacker to execute arbitrary code over a network. The flaw can lead to full code execution, compromising confidentiality, integrity, and availability of affected systems. The underlying weakness is captured by CWE‑125, which describes improper bounds checking.

Affected Systems

Microsoft 365 Apps for Enterprise, Microsoft Office LTSC 2021, and Microsoft Office LTSC 2024 are susceptible to this flaw. The vulnerability was identified in these product bundles, and any installation of the listed versions is potentially impacted.

Risk and Exploitability

The CVSS v3 score is 8.8, indicating high severity. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. The attack vector is inferred to involve network exposure, as the description notes code execution over a network and the attacker needs to be unauthorized, implying no authentication is required.

Generated by OpenCVE AI on October 17, 2026 at 05:12 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Download and install the latest Microsoft Office updates from the Microsoft Update Catalog as detailed in the MSRC advisory, ensuring the patch for CVE-2026-105595 is applied.
  • Configure Office applications to run with least privilege and restrict network access so that only trusted clients can open Office Access databases.
  • Apply network segmentation and monitor traffic for unusual Office Access connections, and audit logs for attempts to exploit the flaw.

Generated by OpenCVE AI on October 17, 2026 at 05:12 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 15 Oct 2026 16:00:00 +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 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, '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 execute code over a network.
Title Microsoft Office Access Remote Code Execution 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': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Subscriptions

Microsoft 365 Apps Office 2021 Office 2024
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-31T18:00:36.449Z

Reserved: 2026-10-05T16:11:35.831Z

Link: CVE-2026-105595

cve-icon Vulnrichment

Updated: 2026-10-13T21:12:19.237Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-13T19:17:58.437

Modified: 2026-10-15T15:49:41.373

Link: CVE-2026-105595

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T05:15:03Z

Weaknesses