High ยท published October 14, 2025
โก An unauthorized attacker can exploit a use-after-free vulnerability in Microsoft Excel to execute code locally! This means your spreadsheet could become a gateway for mischief! Think of it as a chef who leaves a hot pan on the stove without supervision โ if someone wanders into the kitchen, they could cook up some trouble without anyone noticing. An attacker could gain control of the system, potentially accessing sensitive information or installing malicious software. The implications could be absolutely devastating, especially if sensitive data is involved or if it spreads to other systems.
Think of it as a chef who leaves a hot pan on the stove without supervision โ if someone wanders into the kitchen, they could cook up some trouble without anyone noticing. This use-after-free vulnerability occurs when Excel accesses memory that has already been freed, allowing attackers to execute arbitrary code. A crafty attacker could leverage this flaw to run malicious scripts without proper authorization.
An attacker could gain control of the system, potentially accessing sensitive information or installing malicious software. The implications could be absolutely devastating, especially if sensitive data is involved or if it spreads to other systems. To protect yourself, update Microsoft Excel to the latest version as soon as possible. Ensure that automatic updates are enabled to receive patches promptly, and consider reviewing your security settings to harden your defenses. You've got this! With these steps, you're on your way to securing your environment. ๐ก๏ธ
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/365_apps | all versions | โ |
| microsoft/365_apps | all versions | โ |
| microsoft/excel | all versions | โ |
| microsoft/excel | all versions | โ |
| microsoft/office | all versions | โ |
| microsoft/office | all versions | โ |
| microsoft/office_long_term_servicing_channel | all versions | โ |
| microsoft/office_long_term_servicing_channel | all versions | โ |
| microsoft/office_long_term_servicing_channel | all versions | โ |
| microsoft/office_long_term_servicing_channel | all versions | โ |
| microsoft/office_long_term_servicing_channel | all versions | โ |
| microsoft/office_long_term_servicing_channel | all versions | โ |
| microsoft/office_online_server | < 16.0.10417.20059 | 16.0.10417.20059 |