CVE-2026-54131 Details
Description
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
A use-after-free vulnerability has been identified in Microsoft Office Excel. This issue allows an unauthorized attacker to execute code locally. The vulnerability arises from improper memory management, which can be exploited by manipulating how Excel handles certain objects in memory.
Users can download the security update for this vulnerability through the Microsoft Update Catalog. For Microsoft Office 2019, Office 365 for Mac, and various LTSC versions, specific update links are available. Office Online Server users can also download the security update from the Microsoft Download Center.
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-2026-54131 | [email protected] | Vendor AdvisoryPatch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft 365 apps | All versions |
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
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | Initial Analysis | [email protected] |
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 14, 2026 | New CVE Received | [email protected] |