United States, Australia, Canada, New Zealand and United Kingdom cybersecurity authorities, including the Cybersecurity and Infrastructure Security Agency (CISA), National Security Agency (NSA), Federal Bureau of Investigation (FBI), Australian Cyber Security Centre (ACSC), Canadian Centre for Cyber Security (CCCS), New Zealand National Cyber Security Centre (NZ NCSC) and United Kingdom’s National Cyber Security Centre (NCSC-UK) issued a joint Cybersecurity Advisory yesterday detailing the most exploited technology vulnerabilities from 2021. The advisory provides details on the top 15 Common Vulnerabilities and Exposures (CVEs) routinely exploited by malicious cyber actors in 2021, as well as other CVEs frequently exploited.
U.S., Australian, Canadian, New Zealand, and UK cybersecurity authorities report that malicious cyber actors aggressively targeted newly disclosed critical software vulnerabilities against broad target sets, including public and private sector organizations worldwide in 2021. To a lesser extent, malicious cyber actors continued to exploit publicly known, dated software vulnerabilities across a broad spectrum of targets.
Important to note is that three of the top 15 routinely exploited vulnerabilities were also routinely exploited in 2020. As the agencies note, their continued exploitation indicates that many organizations fail to patch software in a timely manner and remain vulnerable to malicious cyber actors.
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