CVE-2020-1224 Microsoft Excel Information Disclosure Vulnerability

What is CVE-2020-1224?

CVE-2020-1224 is a medium-severity vulnerability in Microsoft 365 Apps, published on 11 Sep 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

<p>An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data.</p> <p>To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created.</p> <p>The update addresses the vulnerability by changing the way certain Excel functions handle objects in memory.</p>

Which versions are affected by CVE-2020-1224?

It affects 6 products.

Products include Microsoft 365 Apps, Microsoft Excel, Microsoft Office, Microsoft Office Online Server, Microsoft Office Web Apps, Microsoft Sharepoint Enterprise Server.

How do I fix CVE-2020-1224?

No fix has been published for CVE-2020-1224 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-1224 being exploited?

There is no known exploitation of CVE-2020-1224 in the wild and no public exploit code.

Other vulnerabilities in Microsoft 365 Apps

• CVE-2024-21413 Microsoft Outlook Improper Input Validation Exploited Critical 9.8
• CVE-2023-23397 Microsoft Office Outlook Privilege Escalation Exploited Critical 9.8
• CVE-2024-38189 Microsoft Project Remote Code Execution Vulnerability Exploited High 8.8
• CVE-2023-35311 Microsoft Outlook Security Feature Bypass Exploited High 8.8
• CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Exploited High 7.8

All Microsoft 365 Apps vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rh7x-98m6-6q46.