Microsoft Office Access: Remote code execution (heap-based buffer overflow)
Summary
Microsoft Office Access contains a heap-based buffer overflow (CWE-122) that allows code execution. An unauthorized attacker can exploit it over the network, but a user must open a crafted Access file, typically one delivered by email or a shared drive. Microsoft rates the flaw as Important, and the risk is concentrated on workstations where Access is installed.
Affected
- Microsoft 365 Apps for Enterprise (32-bit and x64): 16.0.1 up to the fixed build in the Microsoft advisory (exact build unknown)
- Office LTSC 2021: 16.0.1 before 16.0.14334.21048
- Office LTSC 2024: 16.0.0 before 16.0.17932.21140
- Access 2016, Office 2019 and Mac editions: not listed in the sources reviewed; verify on the MSRC page
Fixed in
- Office LTSC 2021: 16.0.14334.21048
- Office LTSC 2024: 16.0.17932.21140
- Microsoft 365 Apps for Enterprise: Unknown; check the MSRC advisory for the build number
Workaround
No vendor-documented workaround. Interim measures (recommendation, not from the vendor):
- Keep Office files from untrusted email or downloads in Protected View
- Block or quarantine suspicious attachments at the mail gateway
Exploitation
- No known exploitation at publication; CISA KEV listing reported as 'No' by Strix, not directly verified
- No public exploit known (CVSS temporal E:U)
- The actively exploited Patch Tuesday flaw is a different Outlook issue (CVE-2026-124194)
Our recommendation
- Deploy the November 2026 Office updates via the Microsoft 365 update channel, WSUS or Intune, with high priority on workstations that have Access installed.
- Verify the build number on each machine against the fixed versions.
- Remind users not to open Office or Access files from unknown senders, and monitor mail gateway and endpoint alerts.
- Uninstall Access where it is not needed to reduce exposure.
Information from Microsoft (Patch Tuesday November 2026)
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-110060 msrc.microsoft.com
- CVE.org record CVE-2026-110060 www.cve.org
- Strix CVE-2026-110060 (secondary, version ranges) www.strix.ai
- Patch Tuesday November 2026 overview (NTCompatible) www.ntcompatible.com
- Patch Tuesday table (Newsbeep, severity rating) www.newsbeep.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 10 Nov 2026, 23:45.
Original description (NVD)
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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