CVE-2026-48580 Details
Description
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
A vulnerability exists in Microsoft Office Excel due to an untrusted pointer dereference, which could allow an unauthorized attacker to locally disclose information. This vulnerability affects multiple versions of Excel, including Excel 2016 (both 32-bit and 64-bit editions), Office LTSC for Mac 2021 and 2024, Office 365 for Mac, and several editions of Microsoft 365 Apps for Enterprise. The issue arises when a user is convinced to open a malicious Office file, potentially allowing the attacker to read small portions of heap memory.
Users can download the security update for this vulnerability through the Microsoft Update Catalog or via the Office Update mechanism. Specific download links are available in the Microsoft Knowledge Base articles referenced in the product details.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48580 | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-822 | Untrusted Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft 365 apps | All versions |
CPE
Remediation
| |
| microsoft excel | 2016 |
CPE
Remediation
| |
| microsoft microsoft 365 | All versions |
CPE
Remediation
| |
| microsoft office 2019 | All versions |
CPE
Remediation
| |
| microsoft office 2021 | All versions |
CPE
Remediation
| |
| microsoft office 2024 | All versions |
CPE
Remediation
| |
| microsoft office online server | < 16.0.10417.20175 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | Initial Analysis | [email protected] |
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 14, 2026 | New CVE Received | [email protected] |