Latest cybersecurity reporting from selected sources.

Also, Arch Linux Attack, Estonia Quarantines Russian Emails, Joomla FlawThis week, ShinyHunters leaked alleged Madison Square Garden data, a U.S. senator pressed CISA on regional staffing cuts, an Arch Linux supply-chain attack, Mackay Sugar began recovery from a ransomware attack, Novo Nordisk faced dueling breach claims - and more compelling cybersecurity news.

Researchers Trace Linux and Windows Toolsets to Suspected PRC Espionage ActivityNewly discovered malware tied to China-linked actors breached telecom providers across Asia and the Middle East, highlighting growing efforts to gain persistent access into interconnected communications infrastructure.

Also, YellowKey Gets CVE, 7-Eleven Breach, Linux Maintainers Warn on AI Bug SpamThis week, more incidents than we can list here. Among them: cloned Shai-Hulud malware, a new maximum CVSS Cisco flaw. Edge to stop loading passwords in plaintext. Tycoon 2FA offers a way around Microsoft multifactor. Convenience, taquitos and data breach: The 7-Eleven story. A MENA crackdown.

This week, the shadows moved faster than the patches

Hackers are targeting developers by exploiting the critical vulnerability CVE-2025-11953 in the Metro server for React Native to deliver malicious payloads for Windows and Linux. [...]

Hackers are targeting developers by exploiting the critical vulnerability CVE-2025-11953 in the Metro server for React Native to deliver malicious payloads for Windows and Linux. [...]

A sophisticated threat actor that uses Linux-based malware to target telecommunications providers has recently broadened its operations to include organizations in Southeastern Europe. [...]

It’s easy to think your defenses are solid — until you realize attackers have been inside them the whole time. The latest incidents show that long-term, silent breaches are becoming the norm. The best defense now isn’t just patching fast, but watching smarter and staying alert for what you don’t expect

28,000 Customers, Including Banks and US Government Agencies, Appear to Be AffectedCommercial Linux distribution producer Red Hat has issued a security alert warning that attackers stole customer data from its consulting arm's GitLab instance. The hacking group, Crimson Collective, claims to have stolen one terabyte of data pertaining to 28,000 customers.

A threat actor claimed 28,000 private repositories had been compromised, and the Linux software maker said it had "initiated necessary remediation steps."

Threat actors have been observed exploiting a now-patched critical SAP NetWeaver flaw to deliver the Auto-Color backdoor in an attack targeting a U.S.-based chemicals company in April 2025

A newly discovered Go-based Linux botnet malware named PumaBot is brute-forcing SSH credentials on embedded IoT devices to deploy malicious payloads. [...]

Cybersecurity researchers have discovered a new "0.0.0.0 Day" impacting all major web browsers that malicious websites could take advantage of to breach local networks

Also: Hacker Sells Data Obtained Through Snowflake AttackThis week, Microsoft deprecated NTLM authentication, a hacker put apparently stolen Snowflake data up for sale, Ticketmaster confirmed its breach, Cisco patched Webex vulnerabilities, pro-Russian hacktivists claimed a DDoS attack in Spain and Kaspersky launched a free virus removal tool for Linux.

Also: Turla Targets European Missions and Google Patches Chrome Zero-DaysThis week, hackers used a Linus backdoor and a Microsoft client management tool; Santander Bank, the Helsinki Education Division, an Australian energy provider and auction house Christie's were breached; hackers targeted European missions in the Middle East; and Google patched a zero-day flaw.

Also: Implications of a Critical Linux Utility Backdoor; Focus on Cloud SecurityIn the latest weekly update, ISMG editors discussed key insights on OT security from the Cyber Security for Critical Assets Summit in Houston, the implications of a critical Linux utility found to have a backdoor, and a CISO's perspective on comprehensive cloud security strategy.

A financially motivated hacking group named Magnet Goblin uses various 1-day vulnerabilities to breach public-facing servers and deploy custom malware on Windows and Linux systems. [...]

Also: A Widespread Linux Bootloader VulnerabilityThis week, the U.S. banned AI robocalls, researchers discovered a Linux bootloader flaw, France investigated health sector hackings, the feds offered money for Hive information, Verizon disclosed an insider breach, Germany opened a cybersecurity center, and cyberattack victims reported high costs.

Poorly secured Linux SSH servers are being targeted by bad actors to install port scanners and dictionary attack tools with the goal of targeting other vulnerable servers and co-opting them into a network to carry out cryptocurrency mining and distributed denial-of-service (DDoS) attacks

The threat actors linked to Kinsing have been observed attempting to exploit the recently disclosed Linux privilege escalation flaw called Looney Tunables as part of a "new experimental campaign" designed to breach cloud environments