china
Chinese Mustang Panda hackers deploy infostealers via CoolClient backdoor
The Chinese espionage threat group Mustang Panda has updated its CoolClient backdoor to a new variant that can steal login data from browsers and monitor the clipboard. According to Kaspersky researchers, the malware has also been used to deploy a previously unseen rootkit. However, a technical analysis will be provided in a future report. CoolClient has […]
China-linked hackers exploited Sitecore zero-day for initial access
An advanced threat actor tracked as UAT-8837 and believed to be linked to China has been focusing on critical infrastructure systems in North America, gaining access by exploiting both known and zero-day vulnerabilities. The hacker group has been active since at least 2025, and its purpose appears to be mainly to obtain initial access to […]
Cisco finally fixes AsyncOS zero-day exploited since November
Cisco has finally patched a maximum-severity Cisco AsyncOS zero-day exploited in attacks against Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances since November 2025. As Cisco explained in December, when it disclosed the vulnerability (CVE-2025-20393), it affects only Cisco SEG and Cisco SEWM appliances with non-standard configurations when the Spam Quarantine […]
New China-linked hackers breach telcos using edge device exploits
A sophisticated threat actor that uses Linux-based malware to target telecommunications providers has recently broadened its operations to include organizations in Southeastern Europe. Tracked internally by Cisco Talos as UAT-7290, the actor shows strong China nexus indicators and typically focuses on telcos in South Asia in cyber-espionage operations. Active since at least 2022, the UAT-7290 group also serves […]
VMware ESXi zero-days likely exploited a year before disclosure
Chinese-speaking threat actors used a compromised SonicWall VPN appliance to deliver a VMware ESXi exploit toolkit that seems to have been developed more than a year before the targeted vulnerabilities became publicly known. In attacks from December 2025 analyzed by Huntress, managed security company, the hackers used a sophisticated virtual machine (VM) escape that likely exploited three VMware […]
Taiwan says China’s attacks on its energy sector increased tenfold
The National Security Bureau in Taiwan says that China’s attacks on the country’s energy sector increased tenfold in 2025 compared to the previous year. A report from the agency highlights that attackers targeted critical infrastructure in nine key sectors, and the total number of cyber incidents linked to China grew by 6%. The emergency rescue […]
Malicious extensions in Chrome Web store steal user credentials
Two Chrome extensions in the Web Store named ‘Phantom Shuttle’ are posing as plugins for a proxy service to hijack user traffic and steal sensitive data. Both extensions are still present in Chrome’s official marketplace at the time of writing and have been active since at least 2017, according to a report from researchers at the […]
Cisco warns of unpatched AsyncOS zero-day exploited in attacks
Cisco warned customers today of an unpatched, maximum-severity Cisco AsyncOS zero-day actively exploited in attacks targeting Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances. This yet-to-be-patched zero-day (CVE-2025-20393) affects only Cisco SEG and Cisco SEWM appliances with non-standard configurations, when the Spam Quarantine feature is enabled and exposed on the Internet. […]
Google links more Chinese hacking groups to React2Shell attacks
Over the weekend, Google’s threat intelligence team linked five more Chinese hacking groups to attacks exploiting the maximum-severity “React2Shell” remote code execution vulnerability. Tracked as CVE-2025-55182, this actively exploited flaw affects the React open-source JavaScript library and allows unauthenticated attackers to execute arbitrary code in React and Next.js applications with a single HTTP request. While multiple […]
Critical React2Shell flaw actively exploited in China-linked attacks
Multiple China-linked threat actors began exploiting the React2Shell vulnerability (CVE-2025-55182) affecting React and Next.js just hours after the max-severity issue was disclosed. React2Shell is an insecure deserialization vulnerability in the React Server Components (RSC) ‘Flight’ protocol. Exploiting it does not require authentication and allows remote execution of JavaScript code in the server’s context. For the Next.js framework, […]