Code execution via heap-based buffer overflow
Published Aug 11, 2026 · Updated Aug 25, 2026
Heap-based buffer overflow in Microsoft Office Excel allows attackers to execute code via local processing of crafted content. Microsoft has not disclosed the affected parser, file format, or code path; the public record identifies only a heap-based buffer overflow in Excel and links to the MSRC bulletin. The published CVSS vector indicates local delivery with user interaction rather than direct network reachability, so exposure depends on attacker-supplied Excel content being opened or otherwise processed by a vulnerable Office component.
Summary
What happened
Heap-based buffer overflow in Microsoft Office Excel allows attackers to execute code via local processing of crafted content. Microsoft has not disclosed the affected parser, file format, or code path; the public record identifies only a heap-based buffer overflow in Excel and links to the MSRC bulletin. The published CVSS vector indicates local delivery with user interaction rather than direct network reachability, so exposure depends on attacker-supplied Excel content being opened or otherwise processed by a vulnerable Office component.
The record
- CVE
- CVE-2026-68801
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-122, T1203
- 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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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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