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
https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01

Configurations

No configuration.

History

07 Jan 2026, 21:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-07 21:15

Updated : 2026-01-08 18:08

NVD link : CVE-2025-66620

Mitre link : CVE-2025-66620

CVE.ORG link : CVE-2025-66620

JSON object : View

Products Affected

No product.

CWE

CWE-553

Command Shell in Externally Accessible Directory

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