Accessibility Options |  Sitemap |  Contact Us
   
 
 
 
HOME space ABOUTCERTIn space KNOWLEDGEBASE space TRAINING space ADVISORIES space VULNOTES space space Facebook space x space insta space youtube space Linkedin
WLine
DigitalIndia
WLine
csk
WLine
Full Member FIRST
Line
Operational Member TFCSIRT
Line
Accredited Member APCERT
Line
Global Research Partner APWG
Line
Associate Partner Charter
Line
CNA
WLine
 Directions by CERT-In under  Section 70B, Information  Technology Act 2000
WLine
 Guidelines on Information  Security Practices for  Government Entities
WLine
 15 Elemental Cyber NEW
 Defense Controls for Micro,
 Small, and Medium Enterprises
 (MSMEs)
WLine
 Technical Guidelines on NEW  SBOM, QBOM & CBOM, AIBOM
 and HBOM Version 2.0
WLine
 Cyber Security Guidelines for
 Smart City Infrastructure NEW
WLine
 Cyber Security Framework
 and Guidelines for Space NEW
 including Satellite
 Communication
About CERT-in
Line
point point Client's /Citizen's Charter
Line
point point Roles & Functions
Line
point point Advisory Committee
Line
point point Act/Rules/Regulations
Line
point point Internal Complaint Committee         (ICC) 
Line
point point RFC2350 
line
point point Press  
Line
point point Tender 
Line
point point Subscribe Mailing List
Line
point point Contact Us
Line
Line
Reporting
point
 Incident Reporting
point
Line
point
 Vulnerability Reporting
point
Line
point
 Feedback
point
Line
KnowledgeBase
Line
point Point Guidelines
Line
point Point Presentations
Line
point Point White Papers 
Line
point Point Annual Report 
Line
Line
Line
line
Line
line
line
Advisories
Line
VulnerabilityNotes
Line
RelatedLinks
Line
point Point World CERTs
Line
point point Antivirus Resources
line
point point FAQ
line
line
Line
Line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
line
spacer
Home - Vulnerability NotesPrint
point
CERT-In Vulnerability Note CIVN-2026-0005
Privilege Escalation Vulnerability in TOTOLINK EX200 Firmware

Original Issue Date:January 09, 2026

Severity Rating: HIGH

Software Affected

  • TOTOLINK EX200 Wi-Fi Range Extender Firmware (End of Life Model)

Overview

A vulnerability has been reported in TOTOLINK EX200 Firmware which could allow an attacker to gain root-level telnet access resulting in complete system compromise.

Target Audience:
Home users, Network and Security Administrators, IT Operations and System Engineers, Enterprise Architects and CIOs/CTOs, Managed Service Providers (MSPs) using TOTOLINK EX200 Wi-Fi Range Extender

Risk Assessment:
High risk to confidentiality, integrity, and availability.

Impact Assessment:
Potential for complete system compromise, network disruption, and potential data exposure.

Description

TOTOLINK EX200 Firmware is the embedded software that controls the operation, configuration, and network functionality of the TOTOLINK EX200 Wi-Fi range extender.

This vulnerability exists in the TOTOLINK EX200 firmware due to improper handling of malformed firmware upload requests. An authenticated attacker could exploit this vulnerability by uploading a specially crafted firmware file, resulting in gaining access to root-level Telnet service.

Successful exploitation could allow the attacker to gain complete control of the device, execute arbitrary commands, modify configurations, and potentially compromise the target network.

Workaround

  • Restrict administrative access to trusted networks only.
  • Prevent unauthorized users from accessing the management interface.
  • Monitor the device for suspicious or anomalous activity.
  • Replace or upgrade the device with a supported and actively maintained model.

Vendor Information

Totolink
https://www.totolink.net/

References

 
https://thecyberexpress.com/cve-2025-65606-totolink-ex200-firmware/
https://www.securityweek.com/vulnerability-in-totolink-range-extender-allows-device-takeover/

CVE Name
CVE-2025-65606

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
Website Policies |  Terms of Use |  Help Last Updated On March 11, 2026