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High ICSA-26-006-01 3 CVEs

Columbia Weather Systems MicroServer

Published Jan 6, 2026 · Updated Jan 6, 2026 · Revision 2

Vendor: Columbia Weather Systems Product: MicroServer firmware

Summary

Successful exploitation of these vulnerabilities could allow an attacker to redirect connections to an attacker controlled device, gain admin access to the web portal, or gain limited shell access.

Vulnerabilities 3

  • High 8.8
    CVE-2025-61939

    Columbia Weather Systems MicroServer Improper Restriction of Communication Channel to Intended Endpoints

    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 …

    Columbia Weather Systems MicroServer
  • High 8.0
    CVE-2025-66620

    Columbia Weather Systems MicroServer Command Shell in Externally Accessible Directory

    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 m…

    Columbia Weather Systems MicroServer
  • Medium 6.5
    CVE-2025-64305

    Columbia Weather Systems MicroServer Cleartext Storage in a File or on Disk

    MicroServer copies parts of the system firmware to an unencrypted external SD card on boot, which contains user and vendor secrets. An attacker can utilize these plaintext secrets to modify the vendor firmware, or gain admin access to the web portal.

    Columbia Weather Systems MicroServer

Revision history

  1. #1

    Initial Publication

  2. #2

    Revision - Updated Risk Evaluation, Research Acknowledgment, and vendor mitigations.

References