Zyxel Networks
Company Details
Linkedin ID:
zyxel
Website:
Employees number:
817
Number of followers:
17,082
NAICS:
51125
Industry Type:
Homepage:
zyxel.com
IP Addresses:
0
Company ID:
ZYX_3229536
Scan Status:
In-progress
Zyxel Networks Company CyberSecurity Posture
zyxel.com
Focused on innovation and customer-centricity, Zyxel has been connecting people to the internet for 35 years. We keep promoting creativity which meets the needs of customers. This spirit has never been changed since we developed the world’s first integrated 3-in-1 data/fax/voice modem in 1992. Our ability to adapt and innovate with networking technology places us at the forefront of understanding connectivity for telco/service providers, businesses and home users. Privacy Policy: https://www.zyxel.com/privacy_policy.shtml
Zyxel Networks A.I CyberSecurity Scoring
Zyxel Networks Risk Score (AI oriented)Between 650 and 699
Zyxel Networks
Updated:
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Zyxel Networks Global Score (TPRM)XXXX
Zyxel Networks
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Zyxel Networks Company CyberSecurity News & History
Past Incidents
2
Attack Types
2
Zyxel
Ransomware
Rankiteo Explanation
Attack threatening the organization’s existence
Description: Zyxel, a manufacturer of firewalls and security appliances, has faced a ransomware attack due to exploitation of a command injection vulnerability (CVE-2024-42057). Attackers utilized this flaw in devices configured with User-Based-PSK authentication with long usernames. The vulnerability allowed command execution on affected devices, leading to compromised firewalls and potentially providing unauthorized access to network resources. Zyxel took measures by releasing a firmware update and urging users to change admin and user account passwords. The attack has been linked to the Helldown ransomware gang, known for targeting firewalls for initial compromise and deploying ransomware within organizational networks.
Zyxel
Vulnerability
Rankiteo Explanation
Attack threatening the organization's existence: Attack in which company data exposes
Description: A significant spike was observed in exploitation attempts targeting CVE-2023-28771, a critical remote code execution vulnerability affecting Zyxel Internet Key Exchange (IKE) packet decoders. The coordinated attack campaign, observed on June 16, 2025, represents a concentrated burst of malicious activity after weeks of minimal exploitation attempts, with threat actors leveraging UDP port 500 to compromise vulnerable network infrastructure devices. GreyNoise detected 244 unique IP addresses attempting to exploit the vulnerability, indicating a coordinated campaign rather than opportunistic scanning behavior.
Zyxel Networks Company Scoring based on AI Models
Cyber Incidents Likelihood 3 - 6 - 9 months
A.I Risk Score Likelihood 3 - 6 - 9 months
Underwriter Stats for Zyxel Networks
Incidents vs Computer Networking Products Industry Average (This Year)
No incidents recorded for Zyxel Networks in 2025.
Incidents vs All-Companies Average (This Year)
No incidents recorded for Zyxel Networks in 2025.
Incident Types Zyxel Networks vs Computer Networking Products Industry Avg (This Year)
No incidents recorded for Zyxel Networks in 2025.
Incident History — Zyxel Networks (X = Date, Y = Severity)
Zyxel Networks cyber incidents detection timeline including parent company and subsidiaries
Zyxel Networks Company Subsidiaries
Focused on innovation and customer-centricity, Zyxel has been connecting people to the internet for 35 years. We keep promoting creativity which meets the needs of customers. This spirit has never been changed since we developed the world’s first integrated 3-in-1 data/fax/voice modem in 1992. Our ability to adapt and innovate with networking technology places us at the forefront of understanding connectivity for telco/service providers, businesses and home users. Privacy Policy: https://www.zyxel.com/privacy_policy.shtml
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Zyxel Networks CyberSecurity News
November 18, 2025 02:22 PM
Zyxel Networks announces strategic partnership with Avast
Integration of business security solution and firewalls provides unified visibility and protection across networks and endpoints.
November 15, 2025 03:08 PM
Routers Market Is Stunning Worldwide | Cisco, Ericsson, Zyxel
HTF MI just released the Global Routers Market Study, a comprehensive analysis of the market that spans more than 143+ pages and describes...
October 21, 2025 07:00 AM
ZYXEL Authorization Bypass Vulnerability Let Attackers View and Download System Configuration
A critical vulnerability in Zyxel's ATP and USG series firewalls that allows attackers to bypass authorization controls and access sensitive...
September 23, 2025 07:00 AM
Taiwanese firms eye Philippine network communication market amid digital transformation push
As ASEAN countries accelerate their digital transformation efforts, the demand for network communication products and services is rapidly...
June 23, 2025 07:00 AM
Zyxel Devices Hit by Active Exploits Targeting CVE-2023-28771 Vulnerability
A serious security vulnerability, tracked as CVE-2023-28771, is affecting Zyxel networking devices. Security researchers at GreyNoise...
April 23, 2025 07:00 AM
Critical Security Vulnerabilities Found in Zyxel USG FLEX H Series Firewalls Could Compromise Systems
Newly discovered USG FLEX H Series firewalls flaws centered around Zyxel's Linux-based operating system (uOS) that could leave enterprise networks exposed
April 07, 2025 07:00 AM
The Technology Reseller Awards 2025: Full Shortlist announced
We can now reveal all of the shortlisted companies and people for this years Technology Reseller Awards 2025 which will take place on Thursday the 22nd of May...
March 25, 2025 07:00 AM
Chinese Hackers Breach Asian Telecom, Remain Undetected for Over 4 Years
A major telecommunications company located in Asia was allegedly breached by Chinese state-sponsored hackers who spent over four years inside its systems.
February 26, 2025 08:00 AM
Zyxel Networks names Ken Tsai as new president
Cloud networking solutions provider Zyxel Networks has announced the appointment of Ken Tsai as the company's new president.
Frequently Asked Questions
Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
Zyxel Networks CyberSecurity History Information
Official Website of Zyxel Networks
The official website of Zyxel Networks is https://bit.ly/ZyxelNetworks.
Zyxel Networks’s AI-Generated Cybersecurity Score
According to Rankiteo, Zyxel Networks’s AI-generated cybersecurity score is 676, reflecting their Weak security posture.
How many security badges does Zyxel Networks’ have ?
According to Rankiteo, Zyxel Networks currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
Does Zyxel Networks have SOC 2 Type 1 certification ?
According to Rankiteo, Zyxel Networks is not certified under SOC 2 Type 1.
Does Zyxel Networks have SOC 2 Type 2 certification ?
According to Rankiteo, Zyxel Networks does not hold a SOC 2 Type 2 certification.
Does Zyxel Networks comply with GDPR ?
According to Rankiteo, Zyxel Networks is not listed as GDPR compliant.
Does Zyxel Networks have PCI DSS certification ?
According to Rankiteo, Zyxel Networks does not currently maintain PCI DSS compliance.
Does Zyxel Networks comply with HIPAA ?
According to Rankiteo, Zyxel Networks is not compliant with HIPAA regulations.
Does Zyxel Networks have ISO 27001 certification ?
According to Rankiteo,Zyxel Networks is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Industry Classification of Zyxel Networks
Zyxel Networks operates primarily in the Computer Networking Products industry.
Number of Employees at Zyxel Networks
Zyxel Networks employs approximately 817 people worldwide.
Subsidiaries Owned by Zyxel Networks
Zyxel Networks presently has no subsidiaries across any sectors.
Zyxel Networks’s LinkedIn Followers
Zyxel Networks’s official LinkedIn profile has approximately 17,082 followers.
NAICS Classification of Zyxel Networks
Zyxel Networks is classified under the NAICS code 51125, which corresponds to Software Publishers.
Zyxel Networks’s Presence on Crunchbase
No, Zyxel Networks does not have a profile on Crunchbase.
Zyxel Networks’s Presence on LinkedIn
Yes, Zyxel Networks maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/zyxel.
Cybersecurity Incidents Involving Zyxel Networks
As of November 28, 2025, Rankiteo reports that Zyxel Networks has experienced 2 cybersecurity incidents.
Number of Peer and Competitor Companies
Zyxel Networks has an estimated 949 peer or competitor companies worldwide.
What types of cybersecurity incidents have occurred at Zyxel Networks ?
Incident Types: The types of cybersecurity incidents that have occurred include Vulnerability and Ransomware.
How does Zyxel Networks detect and respond to cybersecurity incidents ?
Detection and Response: The company detects and responds to cybersecurity incidents through an containment measures with firmware update, containment measures with password changes, and remediation measures with firmware update, remediation measures with password changes, and containment measures with block malicious ip addresses, conduct urgent audits of internet-exposed zyxel devices, apply cve-2023-28771 patches, and remediation measures with post-exploitation monitoring, implement enhanced monitoring for ike protocol traffic over udp port 500, apply network filtering, and enhanced monitoring with enhanced monitoring for ike protocol traffic over udp port 500..
Incident Details
Can you provide details on each incident ?
Title: Zyxel Ransomware Attack
Description: Zyxel, a manufacturer of firewalls and security appliances, has faced a ransomware attack due to exploitation of a command injection vulnerability (CVE-2024-42057). Attackers utilized this flaw in devices configured with User-Based-PSK authentication with long usernames. The vulnerability allowed command execution on affected devices, leading to compromised firewalls and potentially providing unauthorized access to network resources. Zyxel took measures by releasing a firmware update and urging users to change admin and user account passwords. The attack has been linked to the Helldown ransomware gang, known for targeting firewalls for initial compromise and deploying ransomware within organizational networks.
Type: Ransomware Attack
Attack Vector: Command Injection
Vulnerability Exploited: CVE-2024-42057
Threat Actor: Helldown Ransomware Gang
Motivation: Financial Gain
Title: Zyxel RCE Flaw (CVE-2023-28771) Under Active Exploitation
Description: A significant spike was observed in exploitation attempts targeting CVE-2023-28771, a critical remote code execution vulnerability affecting Zyxel Internet Key Exchange (IKE) packet decoders.
Date Detected: 2025-06-16
Type: Remote Code Execution
Attack Vector: UDP port 500
Vulnerability Exploited: CVE-2023-28771
Threat Actor: Mirai botnet variants
Motivation: Expanding compromised device networks for DDoS attacks and cryptocurrency mining
What are the most common types of attacks the company has faced ?
Common Attack Types: The most common types of attacks the company has faced is Ransomware.
How does the company identify the attack vectors used in incidents ?
Identification of Attack Vectors: The company identifies the attack vectors used in incidents through Firewall Vulnerability and UDP port 500.
Impact of the Incidents
What was the impact of each incident ?
Incident : Ransomware Attack ZYX000112624
Systems Affected: FirewallsSecurity Appliances
Incident : Remote Code Execution ZYX902061725
Systems Affected: Internet-exposed Zyxel devices
Which entities were affected by each incident ?
Incident : Ransomware Attack ZYX000112624
Entity Name: Zyxel
Entity Type: Manufacturer
Industry: Technology
Incident : Remote Code Execution ZYX902061725
Entity Name: Zyxel
Entity Type: Network Infrastructure
Industry: Technology
Location: Global
Response to the Incidents
What measures were taken in response to each incident ?
Incident : Ransomware Attack ZYX000112624
Containment Measures: Firmware UpdatePassword Changes
Remediation Measures: Firmware UpdatePassword Changes
Incident : Remote Code Execution ZYX902061725
Containment Measures: Block malicious IP addresses, conduct urgent audits of internet-exposed Zyxel devices, apply CVE-2023-28771 patches
Remediation Measures: Post-exploitation monitoring, implement enhanced monitoring for IKE protocol traffic over UDP port 500, apply network filtering
Enhanced Monitoring: Enhanced monitoring for IKE protocol traffic over UDP port 500
Data Breach Information
What measures does the company take to prevent data exfiltration ?
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: Firmware Update, Password Changes, , Post-exploitation monitoring, implement enhanced monitoring for IKE protocol traffic over UDP port 500, apply network filtering.
How does the company handle incidents involving personally identifiable information (PII) ?
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by firmware update, password changes, , block malicious ip addresses, conduct urgent audits of internet-exposed zyxel devices and apply cve-2023-28771 patches.
Ransomware Information
Was ransomware involved in any of the incidents ?
Incident : Ransomware Attack ZYX000112624
Ransomware Strain: Helldown
Lessons Learned and Recommendations
What lessons were learned from each incident ?
Incident : Remote Code Execution ZYX902061725
Lessons Learned: Continued vigilance and proactive security measures are necessary to prevent successful compromises.
What recommendations were made to prevent future incidents ?
Incident : Remote Code Execution ZYX902061725
Recommendations: Block malicious IP addresses, conduct urgent audits, apply patches, implement enhanced monitoring, apply network filtering
What are the key lessons learned from past incidents ?
Key Lessons Learned: The key lessons learned from past incidents are Continued vigilance and proactive security measures are necessary to prevent successful compromises.
What recommendations has the company implemented to improve cybersecurity ?
Implemented Recommendations: The company has implemented the following recommendations to improve cybersecurity: Block malicious IP addresses, conduct urgent audits, apply patches, implement enhanced monitoring and apply network filtering.
References
Where can I find more information about each incident ?
Incident : Remote Code Execution ZYX902061725
Source: GreyNoise
Where can stakeholders find additional resources on cybersecurity best practices ?
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: GreyNoise.
Initial Access Broker
How did the initial access broker gain entry for each incident ?
Incident : Ransomware Attack ZYX000112624
Entry Point: Firewall Vulnerability
Incident : Remote Code Execution ZYX902061725
Entry Point: UDP port 500
Post-Incident Analysis
What were the root causes and corrective actions taken for each incident ?
Incident : Ransomware Attack ZYX000112624
Root Causes: Command Injection Vulnerability (CVE-2024-42057)
Corrective Actions: Firmware Update, Password Changes,
Incident : Remote Code Execution ZYX902061725
Root Causes: CVE-2023-28771 vulnerability in Zyxel IKE packet decoders
Corrective Actions: Block malicious IP addresses, conduct urgent audits, apply patches, implement enhanced monitoring, apply network filtering
What is the company's process for conducting post-incident analysis ?
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as Enhanced monitoring for IKE protocol traffic over UDP port 500.
What corrective actions has the company taken based on post-incident analysis ?
Corrective Actions Taken: The company has taken the following corrective actions based on post-incident analysis: Firmware Update, Password Changes, , Block malicious IP addresses, conduct urgent audits, apply patches, implement enhanced monitoring, apply network filtering.
Additional Questions
General Information
Who was the attacking group in the last incident ?
Last Attacking Group: The attacking group in the last incident were an Helldown Ransomware Gang and Mirai botnet variants.
Incident Details
What was the most recent incident detected ?
Most Recent Incident Detected: The most recent incident detected was on 2025-06-16.
Impact of the Incidents
What was the most significant system affected in an incident ?
Most Significant System Affected: The most significant system affected in an incident was FirewallsSecurity Appliances and .
Response to the Incidents
What containment measures were taken in the most recent incident ?
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident were Firmware UpdatePassword Changes, Block malicious IP addresses, conduct urgent audits of internet-exposed Zyxel devices and apply CVE-2023-28771 patches.
Lessons Learned and Recommendations
What was the most significant lesson learned from past incidents ?
Most Significant Lesson Learned: The most significant lesson learned from past incidents was Continued vigilance and proactive security measures are necessary to prevent successful compromises.
What was the most significant recommendation implemented to improve cybersecurity ?
Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was Block malicious IP addresses, conduct urgent audits, apply patches, implement enhanced monitoring and apply network filtering.
References
What is the most recent source of information about an incident ?
Most Recent Source: The most recent source of information about an incident is GreyNoise.
Initial Access Broker
What was the most recent entry point used by an initial access broker ?
Most Recent Entry Point: The most recent entry point used by an initial access broker were an UDP port 500 and Firewall Vulnerability.
Post-Incident Analysis
What was the most significant root cause identified in post-incident analysis ?
Most Significant Root Cause: The most significant root cause identified in post-incident analysis was Command Injection Vulnerability (CVE-2024-42057), CVE-2023-28771 vulnerability in Zyxel IKE packet decoders.
What was the most significant corrective action taken based on post-incident analysis ?
Most Significant Corrective Action: The most significant corrective action taken based on post-incident analysis was Firmware UpdatePassword Changes, Block malicious IP addresses, conduct urgent audits, apply patches, implement enhanced monitoring, apply network filtering.
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