Cisco Zero-Day Under Active Attack, US Issues AI Security Order, and New "HTTP/2 Bomb" Threatens Web Servers
Summary
This cybersecurity brief for June 5, 2026, covers a critical period marked by significant government policy shifts and high-stakes vulnerabilities. The White House issued a landmark executive order to govern AI security, establishing a voluntary framework for collaboration with developers. Concurrently, Cisco is grappling with an actively exploited zero-day in its SD-WAN products with no patch yet available. A new DoS attack dubbed "HTTP/2 Bomb" threatens major web servers, while the EU moves to strengthen its own cyber resilience with updates to NIS2. Ransomware gangs continue their global campaigns, and regulators in Asia are raising alarms over AI-powered cyber risks, highlighting a complex and evolving threat landscape.
Today New Articles
Actively Exploited Zero-Day in Cisco SD-WAN Allows Root Access, No Patch Available
Cisco has issued an urgent warning for a high-severity zero-day vulnerability, CVE-2026-20245, affecting its Catalyst SD-WAN products. The flaw is being actively exploited in the wild, allowing unauthenticated attackers to execute commands with root privileges...
Hong Kong Regulator Sounds Alarm on AI-Powered Cyberattacks, Mandates Stronger Defenses
Hong Kong's financial watchdog, the Securities and Futures Commission (SFC), has issued a stern warning about the escalating threat of AI-powered cyberattacks. The regulator observes that AI is lowering the barrier to entry for cybercrime, enabling more sophis...
Critical Oracle WebLogic Flaw (CVSS 10.0) Poses Severe Edge-Exposure Risk
A critical vulnerability in Oracle's WebLogic Server Proxy Plug-in, CVE-2026-21962, has been identified as a major threat with a CVSS score of 10.0. The flaw affects the proxy layer that sits at the network edge, making it exploitable by an unauthenticated att...
Google Chrome Flaw (CVE-2026-11257) Allows Navigation Bypass, Update Recommended
A low-severity vulnerability, CVE-2026-11257, has been disclosed in Google Chrome, affecting versions prior to 149.0.7827.53. The flaw, caused by an inappropriate implementation in the browser's navigation handling, could allow a remote attacker to bypass cert...
At the AFCEA TechNet Cyber conference, a top official from the NSA's Cybersecurity Directorate warned that adversaries are shifting to stealthier tactics and leveraging AI for attacks. Daniel McCormack, the directorate's COO, emphasized that threat actors are...
Article Updates
EU's NIS2 Directive Imposes Strict Cyber Rules, Personal Liability for Logistics Sector Management
Update:The EU is advancing a new cybersecurity package that includes an update to the EU Cybersecurity Act (CSA2), targeted amendments to the NIS2 Directive, and a new Digital Networks Act. The amendments to NIS2 aim to simplify certification provisions and better al...
Agentic AI Attacks Demand a Revolution in Remediation Speed, Experts Say
Update:The cybersecurity market is seeing a wave of new product launches leveraging AI and automation to counter agentic attacks. Noma introduced Agent Access Control for governing AI agents, Asimily launched Segmentation Orchestration for automated network policy, D...
Trump Signs Executive Order on AI Security, Mandating 'Frontier Model' Testing
Update:Further details on the 'Promoting Advanced Artificial Intelligence Innovation and Security' executive order reveal an NSA-led consortium will develop a classified benchmarking process within 60 days to define 'covered frontier models.' Additionally, the Attorn...
Qilin Ransomware Gang Fuels 30% Surge in Attacks, Heavily Targeting Healthcare
Update:The Qilin ransomware group has continued its activity, claiming new victims in diverse sectors. Recent attacks include Austrian private aviation company Avcon Jet, Canadian oilfield services firm Trican Well Service, and Slovenian food manufacturer Don Don. Th...
CISA & NSA Warn of Ongoing Attacks Targeting Critical Fuel Monitoring Systems
Update:The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has now partnered with the FBI, NSA, and Department of Energy to issue an urgent warning regarding ongoing cyberattacks targeting internet-exposed automatic tank gauge (ATG) systems. The updated...