CVE-2026-26112
Received
Received - Intake
Untrusted Pointer Dereference in Excel Enables Local Code Execution
Publication date: 2026-03-10
Last updated on: 2026-03-13
Assigner: Microsoft Corporation
Description
Description
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | 365_apps | * |
| microsoft | 365_apps | * |
| microsoft | excel | 2016 |
| microsoft | excel | 2016 |
| microsoft | office_long_term_servicing_channel | 2021 |
| microsoft | office | 2019 |
| microsoft | office | 2019 |
| microsoft | office_long_term_servicing_channel | 2024 |
| microsoft | office_long_term_servicing_channel | 2021 |
| microsoft | office_long_term_servicing_channel | 2021 |
| microsoft | office_long_term_servicing_channel | 2024 |
| microsoft | office_long_term_servicing_channel | 2024 |
| microsoft | office_online_server | to 16.0.10417.20102 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-822 | The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an untrusted pointer dereference in Microsoft Office Excel that allows an unauthorized attacker to execute code locally on the affected system.
How can this vulnerability impact me? :
The vulnerability can lead to local code execution by an unauthorized attacker, which means the attacker could run malicious code on your system with the privileges of the user running Excel.
- Potential compromise of confidentiality, integrity, and availability of your data and system.
- Possible installation of malware or further exploitation of the system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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