CVE-2025-66620

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.

CVSS v3 8.0 HIGH

8.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.1 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json	Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01	Third Party Advisory US Government Resource

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:columbiaweather:weather_microserver_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:columbiaweather:weather_microserver:-:*:*:*:*:*:*:*

History

22 Jan 2026, 17:33

Type	Values Removed	Values Added
CPE		cpe:2.3:o:columbiaweather:weather_microserver_firmware:::::::: cpe:2.3:h:columbiaweather:weather_microserver:-:::::::*
References	~~() https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json -~~	() https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json - Third Party Advisory
References	~~() https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01 -~~	() https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01 - Third Party Advisory, US Government Resource
First Time		Columbiaweather Columbiaweather weather Microserver Firmware Columbiaweather weather Microserver

07 Jan 2026, 21:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-07 21:15

Updated : 2026-01-22 17:33

NVD link : CVE-2025-66620

Mitre link : CVE-2025-66620

CVE.ORG link : CVE-2025-66620

JSON object : View

Products Affected

columbiaweather

weather_microserver_firmware
weather_microserver

CWE

CWE-553

Command Shell in Externally Accessible Directory

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