CVE-2025-66620

Columbia Weather Systems MicroServer Command Shell in Externally Accessible Directory

HIGH
7.2
CVSS Score
Published: January 7, 2026 at 08:08 PM UTC
Updated: October 7, 2026 at 09:10 AM UTC
2 products affected across 1 vendorWeather Microserver FirmwareWeather Microserver

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Severity
HIGH7.2
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < MS_4.1_14142
Affected range stops below MS_4.1_14142, so it looks safe — our inference, not a vendor statement
columbiaweather-weather-microserver (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-553

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