CVE-2026-70125Hinoki check available

Remote code execution through an undisclosed mechanism

Published Sep 23, 2026 · Updated Sep 23, 2026

Remote code execution in Microsoft Outlook in Office LTSC 2021, Office LTSC 2024, and Microsoft 365 Apps allows attackers to execute code. Microsoft has not published the vulnerable component, unsafe operation, crafted input, or delivery path in retrievable public material. Required privileges, user interaction, and execution context remain undisclosed, so the consequence cannot be bounded beyond code execution in Outlook.

CVSS severityUnavailable
Unscored
EPSS probability0.43%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Remote code execution in Microsoft Outlook in Office LTSC 2021, Office LTSC 2024, and Microsoft 365 Apps allows attackers to execute code. Microsoft has not published the vulnerable component, unsafe operation, crafted input, or delivery path in retrievable public material. Required privileges, user interaction, and execution context remain undisclosed, so the consequence cannot be bounded beyond code execution in Outlook.

The record

CVE
CVE-2026-70125
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Microsoft Corporation
Product
Microsoft Office LTSC 2021
Classifications
T1203
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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=16.0.1 <https://aka.ms/OfficeSecurityReleases

What conditions does exploitation require?

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

What is affected?

Microsoft Corporation · Microsoft Office LTSC 2021version=16.0.1 <https://aka.ms/OfficeSecurityReleases
Microsoft Corporation · Microsoft Office LTSC 2024version=16.0.0 <https://aka.ms/OfficeSecurityReleases
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

T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started