CVE-2026-26144
Cross-Site Scripting in Microsoft Excel Enables Network Data Disclosure
Publication date: 2026-03-10
Last updated on: 2026-03-13
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | 365_apps | * |
| microsoft | 365_apps | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an improper neutralization of input during web page generation, also known as cross-site scripting (XSS), in Microsoft Office Excel.
It allows an unauthorized attacker to disclose information over a network by exploiting how Excel processes input when generating web pages.
How can this vulnerability impact me? :
This vulnerability can lead to information disclosure, meaning an attacker could gain access to sensitive information without authorization.
Since the vulnerability can be exploited remotely over a network without user interaction or privileges, it poses a significant security risk.
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