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Zyxel Networks

Zyxel Networks Vendor Cyber Rating & Cyber Score

bit.ly

Zyxel Networks, a multi-award-winning leader with 35 years of networking expertise, helps businesses stay securely connected with AI-powered solutions for SMBs and the enterprise edge (SMEs). Our award-winning Zyxel Networks Nebula cloud solution is the most comprehensive free cloud networking platform – feature-rich, scalable and designed for everything from a single device to full MSP deployments. Nebula also supports one of the largest ranges of networking devices, including cybersecurity, wireless, switching and fixed wireless access (FWA). Supported by knowledgeable local experts worldwide, we make networking simple, flexible and reliable. Trusted by 1M+ businesses across 150 markets with 100M+ devices shipped, Zyxel Networks


Zyxel Networks A.I CyberSecurity Scoring

Zyxel Networks
Company Information
Website:https://bit.ly/ZyxelNetworks
Employees number:808
Number of followers:18,589
NAICS:51125
Industry Type:Computer Networking Products
Homepage:bit.ly
Zyxel Networks Risk Score (AI oriented)
Between 650 and 699
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Zyxel NetworksComputer Networking Products
Updated:
29/03/2026
683/1000
Weak
B
AaaAaABaaBaBCaaCaC
Powered by our proprietary A.I cyber incident model
Insurance prefers TPRM score to calculate premium
Zyxel Networks Global Score (TPRM)
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Zyxel NetworksComputer Networking Products
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Findings

Zyxel Networks
Zyxel NetworksWeak
Current Score
683B (WEAK)
01000
2 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
SEPTEMBER 2026
690Before Incident
AUGUST 2026
690Before Incident
JULY 2026
688Before Incident
JUNE 2026
687Before Incident
MAY 2026
685Before Incident
APRIL 2026
684Before Incident
MARCH 2026
682Before Incident
FEBRUARY 2026
681Before Incident
JANUARY 2026
680Before Incident
DECEMBER 2025
678Before Incident
NOVEMBER 2025
677Before Incident
OCTOBER 2025
675Before Incident
JUNE 2024
756Before Incident
Ransomware
16 Jun 2024Zyxel Networks
Zyxel

Zyxel Ransomware Attack

643After Incident
CRITICAL-113
ZYX000112624
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.
INCIDENT DETAILS -
TYPE
Ransomware Attack
MOTIVATION
Financial Gain
IMPACT
FirewallsSecurity Appliances
JUNE 2023
756Before Incident
Vulnerability
16 Jun 2023Zyxel Networks
Zyxel

Zyxel RCE Flaw (CVE-2023-28771) Under Active Exploitation

754After Incident
CRITICAL-2
ZYX902061725
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.
INCIDENT DETAILS -
TYPE
Remote Code Execution
MOTIVATION
Expanding compromised device networks for DDoS attacks and cryptocurrency mining
IMPACT
Systems Affected: Internet-exposed Zyxel devices

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