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Senator blasts Microsoft for making default Windows vulnerable to “Kerberoasting”

Senator Wyden claims Microsoft's default use of RC4 encryption caused a ransomware breach exposing 5.6 million medical records, urging the FTC to demand secure software defaults.

Summary by Ars Technica
A prominent US senator has called on the Federal Trade Commission to investigate Microsoft for “gross cybersecurity negligence,” citing the company’s continued use of an obsolete and vulnerable form of encryption that Windows uses by default. In a letter to FTC Chairman Andrew Ferguson, Sen. Ron Wyden (D–Ore.) said an investigation his office conducted into the 2024 ransomware breach of the health care giant Ascension found that the default use …

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Microsoft accused of "serious cybersecurity negligence" that makes Windows vulnerable to attacks such as the Kerberoasting that exploits the weaknesses of the obsolete encryption algorithm RC4Senator Ron Wyden calls on the Federal Trade Commission (FTC) to investigate "Microsoft's lax security practices." He believes that Windows' default configurations make customers vulnerable and contribute to ransomware, piracy and other threats. He denounce…

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Ars Technica broke the news in United States on Wednesday, September 10, 2025.
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