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During my analyzes of the Meinberg SyncBox/PTP/PTPv2 devices, the multi-service business routers of the AudioCodes Mediant family, and the Microsoft Wireless Display Adapter V2 I could identify vulnerabilities. Here you can find the security advisories.

From time to time I play some CTF challenges. Because I do a lot of sports on the weekends, I like CTFs taking place over a longer time period. Here you can find some writeups.