Unauthenticated remote code execution
Published Oct 13, 2026 · Updated Oct 13, 2026
Buffer underwrite in Microsoft Office Excel allows remote attackers to execute code over a network without authentication. Microsoft has not disclosed the affected function, input format, or faulty write operation beyond the buffer-underwrite classification. Exploitation requires user interaction; the published record does not describe that interaction or establish code execution outside the affected application's security context.
Summary
What happened
Buffer underwrite in Microsoft Office Excel allows remote attackers to execute code over a network without authentication. Microsoft has not disclosed the affected function, input format, or faulty write operation beyond the buffer-underwrite classification. Exploitation requires user interaction; the published record does not describe that interaction or establish code execution outside the affected application's security context.
The record
- CVE
- CVE-2026-97008
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-124, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 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 <publication
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Activity data is delayed. The latest report is Sep 28, 2026.
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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