Krebs on Security


Patch Tuesday, May 2026 Edition [link]
Krebs on Security May 12 2026 at 09:46 PM

Artificial intelligence platforms may be just as susceptible to social engineeri...


Artificial intelligence platforms may be just as susceptible to social engineering as human beings, but they are proving remarkably good at finding security vulnerabilities in human-made computer code. That reality is on full display this month with some of the more widely-used software makers -- including Apple, Google, Microsoft, Mozilla and Oracle -- fixing near record volumes of security bugs, and/or quickening the tempo of their patch releases.

Canvas Breach Disrupts Schools & Colleges Nationwide [link]
Krebs on Security May 08 2026 at 02:58 AM

An ongoing data extortion attack targeting the widely-used education technology ...


An ongoing data extortion attack targeting the widely-used education technology platform Canvas disrupted classes and coursework at school districts and universities across the United States today, after a cybercrime group defaced the service's login page with a ransom demand that threatened to leak data from 275 million students and faculty across nearly 9,000 educational institutions.

Anti-DDoS Firm Heaped Attacks on Brazilian ISPs [link]
Krebs on Security Apr 30 2026 at 02:04 PM

A Brazilian tech firm that specializes in protecting networks from distributed d...


A Brazilian tech firm that specializes in protecting networks from distributed denial-of-service (DDoS) attacks has been enabling a botnet responsible for an extended campaign of massive DDoS attacks against other network operators in Brazil, KrebsOnSecurity has learned. The firm's chief executive says the malicious activity resulted from a security breach and was likely the work of a competitor trying to tarnish his company's public image.

‘Scattered Spider’ Member ‘Tylerb’ Pleads Guilty [link]
Krebs on Security Apr 21 2026 at 02:53 PM

A 24-year-old British national and senior member of the cybercrime group "Scatte...


A 24-year-old British national and senior member of the cybercrime group "Scattered Spider" has pleaded guilty to wire fraud conspiracy and aggravated identity theft. Tyler Robert Buchanan admitted his role in a series of text-message phishing attacks in the summer of 2022 that allowed the group to hack into at least a dozen major technology companies and steal tens of millions of dollars worth of cryptocurrency from investors.

Patch Tuesday, April 2026 Edition [link]
Krebs on Security Apr 14 2026 at 09:47 PM

Microsoft today pushed software updates to fix a staggering 167 security vulnera...


Microsoft today pushed software updates to fix a staggering 167 security vulnerabilities in its Windows operating systems and related software, including a SharePoint Server zero-day and a publicly disclosed weakness in Windows Defender dubbed "BlueHammer." Separately, Google Chrome fixed its fourth zero-day of 2026, and an emergency update for Adobe Reader nixes an actively exploited flaw that can lead to remote code execution.

Russia Hacked Routers to Steal Microsoft Office Tokens [link]
Krebs on Security Apr 07 2026 at 05:02 PM

Hackers linked to Russia's military intelligence units are using known flaws in ...


Hackers linked to Russia's military intelligence units are using known flaws in older Internet routers to mass harvest authentication tokens from Microsoft Office users, security experts warned today. The spying campaign allowed state-backed Russian hackers to quietly siphon authentication tokens from users on more than 18,000 networks without deploying any malicious software or code.

Germany Doxes “UNKN,” Head of RU Ransomware Gangs REvil, GandCrab [link]
Krebs on Security Apr 06 2026 at 02:07 AM

An elusive hacker who went by the handle "UNKN" and ran the early Russian ransom...


An elusive hacker who went by the handle "UNKN" and ran the early Russian ransomware groups GandCrab and REvil now has a name and a face. Authorities in Germany say 31-year-old Russian Daniil Maksimovich Shchukin headed both cybercrime gangs and helped carry out at least 130 acts of computer sabotage and extortion against victims across the country between 2019 and 2021.

‘CanisterWorm’ Springs Wiper Attack Targeting Iran [link]
Krebs on Security Mar 23 2026 at 03:43 PM

A financially motivated data theft and extortion group is attempting to inject i...


A financially motivated data theft and extortion group is attempting to inject itself into the Iran war, unleashing a worm that spreads through poorly secured cloud services and wipes data on infected systems that use Iran's time zone or have Farsi set as the default language.

Feds Disrupt IoT Botnets Behind Huge DDoS Attacks [link]
Krebs on Security Mar 20 2026 at 12:49 AM

The U.S. Justice Department joined authorities in Canada and Germany in dismantl...


The U.S. Justice Department joined authorities in Canada and Germany in dismantling the online infrastructure behind four highly disruptive botnets that compromised more than three million hacked Internet of Things (IoT) devices, such as routers and web cameras. The feds say the four botnets -- named Aisuru, Kimwolf, JackSkid and Mossad -- are responsible for a series of recent record-smashing distributed denial-of-service (DDoS) attacks capable of knocking nearly any target offline.

Iran-Backed Hackers Claim Wiper Attack on Medtech Firm Stryker [link]
Krebs on Security Mar 11 2026 at 04:20 PM

A hacktivist group with links to Iran's intelligence agencies is claiming respon...


A hacktivist group with links to Iran's intelligence agencies is claiming responsibility for a data-wiping attack against Stryker, a global medical technology company based in Michigan. News reports out of Ireland, Stryker's largest hub outside of the United States, said the company sent home more than 5,000 workers there today. Meanwhile, a voicemail message at Stryker's main U.S. headquarters says the company is currently experiencing a building emergency.