Is CVE-2025-66620 actively exploited?

CVE-2025-66620 has no public evidence of in-the-wild exploitation as of 2026-01-22.

What is the CVSS score for CVE-2025-66620?

CVE-2025-66620 has a CVSS score of 8.6 (HIGH severity). Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2025-66620?

Patch guidance is available from columbiaweather security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-66620.

Which products are affected by CVE-2025-66620?

1 product: columbiaweather weather microserver firmware.

Fix CVE-2025-66620 - HIGH | CVEDatabase.com

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.

CVSS Metrics

Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: adjacent
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-553

Metadata

Primary Vendor: COLUMBIAWEATHER
Published: 1/7/2026
Last Modified: 1/22/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

columbiaweather : weather_microserver_firmware

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-66620. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-66620

View on NIST NVD

CVE-2025-66620 vulnerability