Latest cybersecurity reporting from selected sources.

In early January 2026, KrebsOnSecurity revealed how a security researcher disclosed a vulnerability that was used to assemble Kimwolf, the world's largest and most disruptive botnet. Since then, the person in control of Kimwolf -- who goes by the handle "Dort" -- has coordinated a barrage of distributed denial-of-service (DDoS), doxing and email flooding attacks against the researcher and this author, and more recently caused a SWAT team to be sent to the researcher's home. This post examines what is knowable about Dort based on public information.

Nonprofit Digital Archive Also Suffers Denial-of-Service Attacks, DefacementThe nonprofit Internet Archive has been hit by hackers, who stole usernames and for 31 million accounts, including email addresses and bcrypt-hashed passwords. In recent days, the digital archive has also suffered defacement and repeat denial-of-service attacks.

31 million folks' usernames, email addresses, salted-encrypted passwords now out there The Internet Archive had a bad day on the infosec front, after being DDoSed and having had its user data stolen in a security breach.…

31 million users' usernames, email addresses and salted-encrypted passwords are out there The Internet Archive had a bad day on the infosec front, after being DDoSed and exposing user data.…

HHS: Bot-Driven Attacks Can Overwhelm Email Servers, Networks and Disrupt WorkflowFederal authorities are warning healthcare and public health sector entities of email bomb attacks, a type of denial-of-service attack that can overwhelm email systems and networks and distract victims from other nefarious activities. The incidents can also disrupt clinical and business workflow.

The OpenSSL project has rolled out fixes to contain two high-severity flaws in its widely used cryptography library that could result in a denial-of-service (DoS) and remote code execution

Cisco has released security updates to contain three vulnerabilities affecting its products, including one high-severity flaw in its Email Security Appliance (ESA) that could result in a denial-of-service (DoS) condition on an affected device