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Zyxel controversies

Controversies tied to this brand in public sources. A listing is not a finding of fault.

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  1. 2025

    End-of-life products affected by actively exploited zero-days

    Zyxel was reported to have declined to issue patches for two zero-day vulnerabilities under active attack because the affected products had officially reached end-of-life status. The issue attracted criticism because the products were reportedly still being used and remained available for purchase through Amazon, raising questions about vulnerability disclosure, support policies, and the treatment of legacy networking equipment.

  2. 2020

    ParkerVision files patent complaints against Zyxel and Buffalo

    Lawsuit filed

    ParkerVision announced that it filed patent infringement complaints against Zyxel Communications Corporation and Buffalo Corporation in the Western District of Texas. The complaints seek a jury trial that would determine, among other matters, financial damages for alleged unauthorized use of its patented technologies. The announcement identifies the two defendants and the court, and states that the requested jury trial would address the alleged unauthorized use and related financial damages.

    Stated objective. To defend ParkerVision's patented technologies and determine financial damages for their alleged unauthorized use.

    Source excerpt

    • ParkerVision, Inc. (OTCQB:PRKR) announced today that it has filed complaints against Zyxel Communications Corporation of Hsinchu, Taiwan and Buffalo Corporation of Nagoya, Japan, for the infringement of its patents.