New Research from Grey Noise Intelligence Flags Resurgence of Older Cybersecurity Vulnerabilities
Summary: GreyNoise Intelligence released a report on April 23, 2025 titled "A Blindspot in Cyber Defense: How Resurgent Vulnerabilities Jeopardize Organizational Security," describing older flaws that are exploited again after extended periods of inactivity. The research analyzed known exploited vulnerabilities in internet-exposed systems published between 2010 and 2020, found resurgent flaws disproportionately affect edge technologies, and grouped their exploitation patterns into three distinct categories.
Why it matters: Bob Rudis, VP of Data Science at GreyNoise, said some of the bugs studied go dark for years before suddenly being exploited, and that they rarely make headlines because they were likely deprioritized years ago. A flaw your team closed out of its patch queue in 2015 can quietly become an active entry point again, and nothing in the news cycle will tell you it has.
Read the original at GreyNoise Blog ↗
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