CVE-2025-61939
High
Description
An unused function in MicroServer can start a reverse SSH connection to a vendor registered domain, without mutual authentication. An attacker on the local network with admin access to the web server, and the ability to manipulate DNS responses, can redirect the SSH connection to an attacker controlled device.
SeverityHigh
CVSS8.8
Exploit probability19. percentile0.3%
ProductColumbiaweather Weather Microserver Firmware
PublishedJan 7, 2026
First seenJan 7, 2026
Weakness typeCWE-923CWE-923
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 |
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