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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-66620 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  ICS-CERT
CVSS-B 8.6 HIGH
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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json ICS-CERT
https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01 ICS-CERT

Weakness Enumeration

CWE-ID CWE Name Source
CWE-553 Command Shell in Externally Accessible Directory ICS-CERT  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-66620
NVD Published Date:
01/07/2026
NVD Last Modified:
01/08/2026
Source:
ICS-CERT