High Β· published October 14, 2025
β‘ A crafty attacker can exploit a type confusion flaw in Microsoft Excel to run arbitrary code locally! Itβs like a magician slipping a decoy into a performance that convinces your audience to believe itβs the real deal. π©β¨ Imagine a restaurant where a waiter accidentally serves the wrong dish to a customer because they mistook the order. Similarly, this vulnerability allows the application to misinterpret data types, causing unintended consequences. If an attacker takes advantage of this, they could potentially run any code they want on your system, leading to unauthorized access, data leaks, or even complete system compromise. This could be absolutely devastating for your organization!
Imagine a restaurant where a waiter accidentally serves the wrong dish to a customer because they mistook the order. Similarly, this vulnerability allows the application to misinterpret data types, causing unintended consequences. This 'type confusion' vulnerability occurs in Microsoft Excel when the application incorrectly processes a resource type, allowing an attacker to execute their own code on the affected system.
If an attacker takes advantage of this, they could potentially run any code they want on your system, leading to unauthorized access, data leaks, or even complete system compromise. This could be absolutely devastating for your organization! To protect yourself, ensure you're running the latest version of Microsoft Excel by checking for updates. Also, minimize risk by limiting file access and being cautious with unfamiliar documents. Don't delay β take these steps today! You've got this! With a little vigilance and these updates, youβll keep your system secure and your data safe! π‘οΈ
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/365_apps | all versions | β |
| microsoft/365_apps | all versions | β |
| microsoft/excel | all versions | β |
| microsoft/excel | all versions | β |
| microsoft/office | all versions | β |
| microsoft/office | all versions | β |
| microsoft/office_long_term_servicing_channel | all versions | β |
| microsoft/office_long_term_servicing_channel | all versions | β |
| microsoft/office_long_term_servicing_channel | all versions | β |
| microsoft/office_long_term_servicing_channel | all versions | β |
| microsoft/office_long_term_servicing_channel | all versions | β |
| microsoft/office_long_term_servicing_channel | all versions | β |
| microsoft/office_online_server | < 16.0.10417.20059 | 16.0.10417.20059 |