Cross-Site Scripting Vulnerability in Microsoft Office Excel
CVE-2026-26144

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Vendor
CVE Published:
10 March 2026

What is CVE-2026-26144?

An issue in Microsoft Office Excel arises from improper handling of input during web page generation, which may allow an unauthorized attacker to craft malicious content. This content can potentially lead to the disclosure of sensitive information over a network, posing significant risks to users’ data security. Users are advised to apply the necessary patches and updates to mitigate the risk associated with this vulnerability.

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Deploy the Patch

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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