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Niels Teusink

OSCP, OSCE3, OSCE, CISSP, MCSE

Niels Teusink is a Principal IT Security Expert at Eye Security, based in Delft, Netherlands.1 He is an accomplished professional in the field of cybersecurity with a strong background in the Dutch Government.1

Expertise and Experience

Teusink brings a wealth of experience to his role, specializing in several key areas of IT security:

  • Red teaming
  • Incident response
  • SOC operations

His expertise has been recognized in the cybersecurity community, particularly for his work in identifying and reporting critical vulnerabilities.

Notable Achievements

One of Teusink's significant contributions to the field was his discovery of a major security flaw in Zyxel devices:

  • In late 2020, he uncovered a secret hardcoded administrative account in Zyxel firmware.34
  • This vulnerability potentially affected around 100,000 Zyxel devices, including firewalls and VPN gateways.35
  • Teusink responsibly reported the bug to Zyxel on November 29, 2020.6
  • His findings led to Zyxel releasing a firmware patch (ZLD V4.60) to address the issue.6

This discovery highlighted Teusink's skills in identifying critical security flaws and his commitment to responsible disclosure practices.

Current Role

At Eye Security, Niels Teusink continues to contribute his expertise to the field of cybersecurity. He works alongside colleagues like Lennart Oorburg and is part of the company's Tech & Product teams, helping to achieve important milestones in the realm of IT security.2

Related Questions

What are some of Niels Teusink's most notable discoveries in cybersecurity?
How did Niels Teusink transition from the Dutch Government to Eye Security?
What specific roles did Niels Teusink play in the discovery of the Zyxel vulnerabilities?
Can you provide examples of Niels Teusink's contributions to red teaming and incident response?
How has Niels Teusink's work impacted the cybersecurity industry?
Niels Teusink
Niels Teusink, photo 1
Niels Teusink, photo 2
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Location

Delft, South Holland, Netherlands