“Sergen is een security expert met een heel positieve houding en een can-do mentaliteit. Met overtuiging gaat hij met uitdagingen aan de slag en hij is doelgericht, vindingrijk en prettig om mee samen te werken. Een collega die ik graag in mijn team heb!”
About
Ethisch hacker, Artificial Intelligence deskundige en Cybersecurity expert; Pianist en…
Experience
Education
Licenses & Certifications
Projects
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Chronos
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Honors & Awards
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Hall of Fame - Informatiebeveiligingsdienst
Gemeente Almelo
https://www.informatiebeveiligingsdienst.nl/responsible-disclosure/2022-coordinated-vulnerability-disclosure-hall-of-fame
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Hall of Fame - Dutch National Police
Politie Nederland
https://www.politie.nl/algemeen/responsible-disclosure-hall-of-fame.html
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Letter of Appreciation - RIVM
Dutch National Institute for Public Health and the Environment (RIVM)
Found 8 vulnerabilities in the systems of governmental body, the Dutch National Institute for Public Health and the Environment (RIVM)
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Hall of Fame - Nokia
Nokia.com
https://www.nokia.com/responsible-disclosure
In the Hall of Fame of Nokia for finding a remote code execution vulnerability in one of their mission critical systems. Non-Disclosure Agreement signed to not share any details. -
Hall of Fame - KPN
KPN
Admitted to the Hall of Fame of KPN four times in 2019, 2020, 2021 and 2022.
https://www.kpn.com/kpn-cert-en/hall-of-fame-en.htm
Found a vulnerability where I could access restricted areas to see, edit and delete current projects, budgets, stakeholders. I also found passwords of other services such as Kadaster and could see blueprints and detailed maps of how buildings look and where underground internet cables are put. I could see for example governmental/police buildings prints…Admitted to the Hall of Fame of KPN four times in 2019, 2020, 2021 and 2022.
https://www.kpn.com/kpn-cert-en/hall-of-fame-en.htm
Found a vulnerability where I could access restricted areas to see, edit and delete current projects, budgets, stakeholders. I also found passwords of other services such as Kadaster and could see blueprints and detailed maps of how buildings look and where underground internet cables are put. I could see for example governmental/police buildings prints and maps. -
Hall of Fame Volker Wessels
Volker Wessels
https://www.volkerwessels.com/nl/responsible_disclosure/hall_of_fame
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Hall of Fame OV-Chipkaart
Translink
https://www.ov-chipkaart.nl/service-and-contact/responsible-disclosure-policy/responsible-disclosure-hall-of-fame.htm
In the Hall of Fame for finding a vulnerability where I could hijack sessions of OV-chip business card applicants and let the card be sent to another address (e.g. my home address), giving the hijacker the opportunity to travel for free until the real applicant of the card discovers he/she/it hasn't received his card. Also could change the subscription making it cheaper…https://www.ov-chipkaart.nl/service-and-contact/responsible-disclosure-policy/responsible-disclosure-hall-of-fame.htm
In the Hall of Fame for finding a vulnerability where I could hijack sessions of OV-chip business card applicants and let the card be sent to another address (e.g. my home address), giving the hijacker the opportunity to travel for free until the real applicant of the card discovers he/she/it hasn't received his card. Also could change the subscription making it cheaper or more expensive for the business at the same time. -
Hall of Fame Tesla
Tesla
https://bugcrowd.com/tesla/hall-of-fame
Found a misconfiguration on 4 servers of Tesla which allowed me to view/read business-related sensitive files.
Languages
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Chinese
Full professional proficiency
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Turkish
Professional working proficiency
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Dutch
Native or bilingual proficiency
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English
Native or bilingual proficiency
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Hebrew
Limited working proficiency
Recommendations received
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