CVE-2026-70276Hinoki check available

Local privilege escalation via use after free

Published Oct 13, 2026 · Updated Oct 13, 2026

Use after free in Microsoft Office Click-to-Run allows local users with existing authorization to elevate privileges on Windows. The available evidence does not identify the affected function, freed object, or triggering operation. The supplied record covers Microsoft Office LTSC 2021, Microsoft Office LTSC 2024, and Microsoft 365 Apps for enterprise, but does not specify the resulting privilege level.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use after free in Microsoft Office Click-to-Run allows local users with existing authorization to elevate privileges on Windows. The available evidence does not identify the affected function, freed object, or triggering operation. The supplied record covers Microsoft Office LTSC 2021, Microsoft Office LTSC 2024, and Microsoft 365 Apps for enterprise, but does not specify the resulting privilege level.

The record

CVE
CVE-2026-70276
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Microsoft Corporation
Product
Microsoft Office LTSC 2021
Classifications
T1068
Attack vector
local
Privileges
authenticated

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

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Is a vulnerable build present?

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

  1. Affected versionversion=16.0.1 <16.0.14334.20974

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

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 · 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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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