Information disclosure via buffer over-read
Published Oct 13, 2026 · Updated Oct 13, 2026
Buffer over-read in Microsoft Office Excel allows remote attackers to disclose information through network-delivered input. The available Microsoft record does not identify the affected code locus, input format, or incorrect read operation beyond the buffer over-read classification. Exploitation requires user interaction but no attacker authentication; the disclosed information is unspecified, with no reported modification or service interruption.
Summary
What happened
Buffer over-read in Microsoft Office Excel allows remote attackers to disclose information through network-delivered input. The available Microsoft record does not identify the affected code locus, input format, or incorrect read operation beyond the buffer over-read classification. Exploitation requires user interaction but no attacker authentication; the disclosed information is unspecified, with no reported modification or service interruption.
The record
- CVE
- CVE-2026-88201
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Microsoft Office LTSC 2021
- Classifications
- CWE-126
- 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=16.0.1 <16.0.14334.20974
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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