Researchers have disclosed the discovery of a critical remote code execution vulnerability in millions of Broadcom cable modems, including about 200 million in Europe alone.

Named Cable Haunt, the flaw consists of a combination of "lack of proper authorization of the web-socket client, default credentials and a programming error in the spectrum analyzer" component of the modems, according to a web site and technical paper published by the four researchers.

The same bug wound up in so many different models of modem because the error actually originated in popular reference software that numerous modem manufacturers copied when coding their own firmware. Unfortunately, this also makes it difficult to pinpoint the precise number of affected brands and models.

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