CVE-2025-66620
High
Description
An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to MicroServer can gain limited shell access, enabling persistence through reverse shells, and the ability to modify or remove data stored in the file system.
SeverityHigh
CVSS8.0
Exploit probability—
ProductColumbiaweather Weather Microserver Firmware
PublishedJan 7, 2026
First seenJan 7, 2026
Weakness typeCWE-553CWE-553
How to fix
Update
- columbiaweather weather_microserver_firmwareMS_4.1_14142 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| columbiaweather weather_microserver_firmware | v < MS_4.1_14142 | MS_4.1_14142 |
Check your version
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