High · published December 9, 2025
⚡ A sneaky use-after-free in Microsoft Excel could let an attacker execute code right on your machine, and it’s hiding in plain sight! Think of it like a chef leaving a dangerous ingredient in the pantry after a meal; anyone who can access that pantry can whip up a toxic dish. If attackers gain access, they could run their malicious scripts as if they were you! The consequences are pretty alarming — unauthorized code execution means an attacker could steal sensitive data, manipulate files, or even take complete control of your system. It's like giving a thief the keys to your house while you’re busy elsewhere!
Think of it like a chef leaving a dangerous ingredient in the pantry after a meal; anyone who can access that pantry can whip up a toxic dish. If attackers gain access, they could run their malicious scripts as if they were you! This vulnerability arises from improper handling of memory in Microsoft Office Excel, allowing an attacker to exploit freed memory, leading to potential code execution. Essentially, once a reference is dropped, the memory area can still be manipulated by unauthorized users.
The consequences are pretty alarming — unauthorized code execution means an attacker could steal sensitive data, manipulate files, or even take complete control of your system. It's like giving a thief the keys to your house while you’re busy elsewhere! To protect yourself, apply the latest security updates from Microsoft immediately. Also, consider enabling macros only for trusted documents and regularly audit your Excel usage to catch any suspicious activity. Stay vigilant! This is fixable! With a few updates and precautions, you can secure your systems. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/365_apps | all versions | — |
| microsoft/365_apps | all versions | — |
| microsoft/excel | all versions | — |
| microsoft/excel | all versions | — |
| microsoft/office | all versions | — |
| microsoft/office | all versions | — |
| microsoft/office_long_term_servicing_channel | all versions | — |
| microsoft/office_long_term_servicing_channel | all versions | — |
| microsoft/office_long_term_servicing_channel | all versions | — |
| microsoft/office_long_term_servicing_channel | all versions | — |
| microsoft/office_long_term_servicing_channel | all versions | — |
| microsoft/office_long_term_servicing_channel | all versions | — |