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AXIOS (Sam Sabin) - OpenAI makes its rival to Anthropic's Mythos more widely available to cyber defenders

OpenAI is rolling out a more permissible version of GPT-5.5 — aka "Spud" — to vetted cyber defenders, the company said Thursday. Why it matters: Recent security testing suggests that GPT-5.5 model is nearly as good at finding and exploiting software bugs as Anthropic's Mythos Preview . The capabilities of the new models have sparked an urgent debate in Silicon Valley and the White House about how to keep them out of the hands of bad actors. Driving the news: OpenAI is opening a limited preview of GPT-5.5-Cyber to vetted cyber defenders who are "responsible for securing critical infrastructure," per a press release. - A source familiar with GPT-5.5-Cyber's abilities told Axios that they were roughly on par with Mythos. One major…

OpenAI is rolling out a more permissible version of GPT-5.5 — aka "Spud" — to vetted cyber defenders, the company said Thursday. Why it matters: Recent security testing suggests that GPT-5.5 model is nearly as good at finding and exploiting software bugs as Anthropic's Mythos Preview . The capabilities of the new models have sparked an urgent debate in Silicon Valley and the White House about how to keep them out of the hands of bad actors. Driving the news: OpenAI is opening a limited preview of GPT-5.5-Cyber to vetted cyber defenders who are "responsible for securing critical infrastructure," per a press release. - A source familiar with GPT-5.5-Cyber's abilities told Axios that they were roughly on par with Mythos. One major…Open

CISA (CISA) - Defending Against China-Nexus Covert Networks of Compromised Devices

Defending against china-nexus covert networks of compromised devices executive summary Defending against China-nexus covert networks of compromised devices  Explaining the widespread shift in tactics, techniques and procedures (TTPs) towards networks of compromised infrastructure, and how to defend against it  Summary With support from the UK Cyber League , this advisory has been jointly released by the National Cyber Security Centre (NCSC-UK) and international partners:  - Australian Signals Directorate’s (ASD’s) Australian Cyber Security Centre (ACSC) - Communications Security Establishment Canada’s (CSE’s) Canadian Centre for Cyber Security (Cyber Centre) - Germany Federal Office for the Protection of the…

CISA (CISA) - Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Across US Critical Infrastructure

Advisory at a Glance Title Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Across US Critical Infrastructure Original Publication April 7, 2026 Executive Summary Iran-affiliated advanced persistent threat (APT) actors are conducting exploitation activity targeting internet-facing operational technology (OT) devices, including programmable logic controllers (PLCs) manufactured by Rockwell Automation/Allen-Bradley. This activity has led to PLC disruptions across several U.S. critical infrastructure sectors through malicious interactions with the project file and manipulation of data on human machine interface (HMI) and supervisory control and data acquisition (SCADA) displays, resulting in operational disruption and…

THENATIONALPULSE (Samuel Martin) - FBI Declares ‘Major Incident’ Following Cyberattack by Chinese Hackers.

The Federal Bureau of Investigation (FBI) has classified a recent cyber intrusion, believed to be carried out by Chinese hackers, as a “major incident” under the Federal Information Security Modernization Act (FISMA). The post FBI Declares ‘Major Incident’ Following Cyberattack by Chinese Hackers. appeared first on The National Pulse .

PULSE POINTS WHAT HAPPENED: The Federal Bureau of Investigation (FBI) declared a suspected Chinese hack a major incident under the Federal Information Security Modernization Act (FISMA). WHO WAS INVOLVED: Chinese hackers, U.S. officials, and FBI personnel. WHEN & WHERE: The breach was reported to Congress in March. IMPACT: FISMA-designated “major incidents” are rare, meaning the breach poses significant risks to U.S. national security . IN FULL The Federal Bureau of Investigation (FBI ) has classified a recent cyber intrusion, believed to be carried out by Chinese hackers, as a “major incident” under the Federal Information Security Modernization Act (FISMA). FISMA guidelines classify a “major incident” as an intrusion that…Open

AXIOS (Sam Sabin) - North Korean hackers implicated in major supply chain attack

Suspected North Korean hackers are believed to be behind an ongoing compromise of the widely used open-source package Axios, which is downloaded millions of times per week, researchers at Google said Tuesday. Why it matters: Hackers briefly turned a widely trusted developer tool into a vehicle for credential-stealing malware that could give attackers ongoing access to infected systems. - Axios, a widely used JavaScript library for making HTTP requests, is not affiliated with Axios Media. Driving the news: Researchers at Google linked the activity to a North Korean group tracked as UNC1069 , which has previously targeted cryptocurrency and decentralized finance companies. - Earlier this week, a maintainer account for the Axios npm…

Suspected North Korean hackers are believed to be behind an ongoing compromise of the widely used open-source package Axios, which is downloaded millions of times per week, researchers at Google said Tuesday. Why it matters: Hackers briefly turned a widely trusted developer tool into a vehicle for credential-stealing malware that could give attackers ongoing access to infected systems. - Axios, a widely used JavaScript library for making HTTP requests, is not affiliated with Axios Media. Driving the news: Researchers at Google linked the activity to a North Korean group tracked as UNC1069 , which has previously targeted cryptocurrency and decentralized finance companies. - Earlier this week, a maintainer account for the Axios npm…Open

AXIOS (Sam Sabin) - Spyware once used by governments is now spreading to cybercriminals

Cybercriminal groups are now using spyware tools once utilized mainly by spies and law enforcement to hack into iPhones, new research shows. Why it matters: Anyone with an iPhone can now be the target of invasive malware that siphons off personal text messages, photos, notes and calendar data. Driving the news: In the last month, researchers at Google, iVerify and Lookout uncovered two campaigns exploiting iPhone vulnerabilities. - Earlier this month, Google researchers said they identified a sophisticated iPhone hacking toolkit, called Coruna , originally built for an unnamed government customer that later ended up in the hands of a Chinese cybercriminal group. TechCrunch later reported that defense contractor L3Harris created the…

Cybercriminal groups are now using spyware tools once utilized mainly by spies and law enforcement to hack into iPhones, new research shows. Why it matters: Anyone with an iPhone can now be the target of invasive malware that siphons off personal text messages, photos, notes and calendar data. Driving the news: In the last month, researchers at Google, iVerify and Lookout uncovered two campaigns exploiting iPhone vulnerabilities. - Earlier this month, Google researchers said they identified a sophisticated iPhone hacking toolkit, called Coruna , originally built for an unnamed government customer that later ended up in the hands of a Chinese cybercriminal group. TechCrunch later reported that defense contractor L3Harris created the…Open