SecuriTricks - CVE-2025-66620

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.

Product(s) Impacted

Vendor	Product	Versions
Microserver	Microserver	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-553

Command Shell in Externally Accessible Directory

A possible shell file exists in /cgi-bin/ or other accessible directories. This is extremely dangerous and can be used by an attacker to execute commands on the web server.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	microserver	microserver	/	/	/	/	/	/	/	/

References

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

CVSS Score

8.6 / 10

CVSS Data - 4.0

Attack Vector: ADJACENT
Attack Complexity: LOW
Attack Requirements: NONE
Privileges Required: LOW
User Interaction: NONE
Scope:
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: HIGH
Exploit Maturity: NOT_DEFINED

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

View Vector String

Timeline

Published: Jan. 7, 2026, 9:15 p.m.
Last Modified: Jan. 8, 2026, 6:08 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2025-66620