PT-2026-58557 · Microsoft · Office Excel
CVE-2026-55053
·
Published
2026-07-14
·
Updated
2026-07-15
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Microsoft Office Excel (affected versions not specified)
Description
A heap-based buffer overflow exists in Microsoft Office Excel, which allows an unauthorized attacker to execute code locally. This issue can be triggered when a user opens a specially crafted workbook, enabling the execution of malicious code with the privileges of the user.
Recommendations
Install the updates released on July 14.
Fix
RCE
DoS
Heap Based Buffer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Office Excel