Code execution via heap-based buffer overflow
Published Sep 8, 2026 · Updated Sep 9, 2026
Heap-based buffer overflow in Microsoft Office allows remote attackers to execute code through network-delivered input after user interaction. Microsoft identifies heap memory corruption but has not published the affected Office component, input format, or erroneous memory operation. No privileges are required, but a user must interact with attacker-controlled content; successful exploitation executes code in the Office process context.
Summary
What happened
Heap-based buffer overflow in Microsoft Office allows remote attackers to execute code through network-delivered input after user interaction. Microsoft identifies heap memory corruption but has not published the affected Office component, input format, or erroneous memory operation. No privileges are required, but a user must interact with attacker-controlled content; successful exploitation executes code in the Office process context.
The record
- CVE
- CVE-2026-69285
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office 2016
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.5569.1000
What conditions does exploitation require?
What is affected?
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.
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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