Local code execution via stack overflow
Published Aug 11, 2026 · Updated Aug 25, 2026
Stack-based buffer overflow in Microsoft Office Access allows attackers to execute code locally in affected Office releases. Microsoft's advisory and the CVE record disclose only a stack-based overwrite in Access and do not identify the affected parser, function, or input field. Affected products include Microsoft 365 Apps for enterprise, Access 2016, Office 2019, and Office LTSC 2021 and 2024; reachability requires local user interaction, and no public source reviewed here reports a proof of concept or in-the-wild exploitation.
Summary
What happened
Stack-based buffer overflow in Microsoft Office Access allows attackers to execute code locally in affected Office releases. Microsoft's advisory and the CVE record disclose only a stack-based overwrite in Access and do not identify the affected parser, function, or input field. Affected products include Microsoft 365 Apps for enterprise, Access 2016, Office 2019, and Office LTSC 2021 and 2024; reachability requires local user interaction, and no public source reviewed here reports a proof of concept or in-the-wild exploitation.
The record
- CVE
- CVE-2026-64912
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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