Morning Brief

Before two of its alleged members were arrested and charged in Australia last month, the hacker group known as TeamPCP carried out a hacking spree unlike any other in history. It tainted hundreds of open-source programs with its malware, stole developer accounts to perpetuate that software supply-chain hacking, and even released a Dune -themed self-spreading worm to automate the process, ultimately breaching more than a thousand companies. Now Google’s threat intelligence group has revealed that during a key moment of TeamPCP’s rampage, the company’s own undercover researcher had infiltrated…

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has warned that attackers are actively exploiting three Linux kernel vulnerabilities, creating an urgent patching and investigation deadline. CISA added CVE-2025-39682 , CVE-2026-53266 , and CVE-2025-39964 to its Known Exploited Vulnerabilities catalog on September 18, 2026, with remediation required by September 21 under Binding Operational Directive 26-04. The KEV catalog tracks vulnerabilities exploited in real-world attacks, while BOD 26-04 requires covered federal civilian agencies to accelerate remediation based on…

CrowdSec has disclosed that attackers copied about 170 private GitHub repositories after a former employee’s account was compromised through May’s TanStack npm supply chain attack. The May 22 theft remained undetected until stolen source code appeared on a cybercrime forum on September 16, showing how a poisoned dependency can outlive its infection window and undermine developer identities. Data Leak Claim The incident traces to CVE-2026-45321 , the compromise of TanStack’s Router and Start ecosystem. On May 11, the threat actor chained an unsafe pull_request_target workflow, GitHub Actions…

A new attack technique dubbed “BragJack” allows a malicious browser extension to seize trusted communication channels used by AI assistants in Chrome, Edge, Opera Neon, Comet, and Claude in Chrome. Rather than bypassing model guardrails or hiding instructions inside web content, the proof-of-concept attacks directly supplied commands to privileged browser components, turning an assistant into a tool for theft and unauthorized actions. Forever Security researcher Gal Weizman demonstrated the technique across all five Chromium-based environments using one extension with browser-specific rules…

A critical vulnerability in Check Point's Security Management and Log Servers could allow an attacker without login credentials to run code as root on those servers over the network. The Security Management Server is the system that controls firewall policy and administrator access. Check Point has released a fix through its LivePatch update channel and says it has no indication that the flaw

WordPress administrators are being urged to update after researchers disclosed Click2Shell, an exploit chain that can turn one malicious link into remote code execution (RCE) on a vulnerable website. The issue begins with a WordPress Core theme-preview weakness that silently installs an attacker-selected theme from the official directory, then becomes a server compromise when chained with insecure pre-activation code in a theme. WordPress addressed the Core flaw in version 7.1.1 , released September 17, 2026, as part of an update containing 11 security fixes, 17 Core bug fixes, and 19 Block…

Cybersecurity researchers have flagged a new Android malware called RatHat that's assessed to be operated by China-based threat actors and features an artificial intelligence (AI)-powered system to navigate and control compromised devices. "Distributed primarily via targeted smishing (SMS/text phishing) and malvertising campaigns leading to deceptive third-party download portals, RatHat uses

SolarWinds has released security updates to address a high-severity flaw in Access Rights Manager (ARM) that, if successfully exploited, could lead to an unauthenticated remote code execution vulnerability. The vulnerability, tracked as CVE-2026-28326, is rated 8.8 out of 10.0 on the CVSS scoring system. The issue affects all versions of Access Rights Manager 2026.2 and prior. "SolarWinds

Microsoft has patched a maximum-severity security flaw in Azure AI Foundry, its enterprise platform for building and managing generative AI applications and agents, that could have allowed an unauthenticated attacker to escalate privileges over the network without any user interaction. Tracked as CVE-2026-85889 , the vulnerability carries the highest possible CVSS score of 10.0, placing it among the most severe cloud security issues disclosed this year. According to Microsoft’s advisory, published on September 17, 2026, the root cause is a missing authentication check for a critical function…