CVE-2026-97748Hinoki check available

Code execution via heap buffer overflow

Published Oct 13, 2026 · Updated Oct 13, 2026

Heap-based buffer overflow in Microsoft Office Excel allows remote attackers to execute code over a network without authorization. The retrieved public sources do not identify the affected function or the operation that overruns the heap buffer. User interaction, required configuration, and execution privileges are not established by the available evidence.

CVSS severityUnavailable
Unscored
EPSS probability0.72%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap-based buffer overflow in Microsoft Office Excel allows remote attackers to execute code over a network without authorization. The retrieved public sources do not identify the affected function or the operation that overruns the heap buffer. User interaction, required configuration, and execution privileges are not established by the available evidence.

The record

CVE
CVE-2026-97748
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Microsoft Corporation
Product
Microsoft Office LTSC for Mac 2024
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.0.0 <publication

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Microsoft Corporation · Microsoft Office LTSC for Mac 2024version=16.0.0 <publication
Microsoft Corporation · Microsoft Office LTSC for Mac 2021version=16.0.1 <publication
Microsoft Corporation · Microsoft Office 365 for Macversion=1.0.0 <publication
Microsoft Corporation · Microsoft Office LTSC 2021version=16.0.1 <16.0.14334.20974
Microsoft Corporation · Microsoft Office LTSC 2024version=16.0.0 <16.0.17932.21056
Microsoft Corporation · Office Online Serverversion=16.0.0.0 <16.0.10417.20228
Microsoft Corporation · Microsoft 365 Apps for enterpriseversion=16.0.1 <https://aka.ms/OfficeSecurityReleases

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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