Poland’s energy control systems were breached through exposed VPN access
On 29 December 2025, coordinated cyberattacks unfolded across Poland’s critical infrastructure, targeting energy and industrial organizations. The attackers struck numerous …
Russian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509)
Russian state-sponsored hackers Fancy Bear (aka APT 28) are exploiting CVE-2026-21509, a Microsoft Office vulnerability for which Microsoft released an emergency fix last …
Notepad++ supply chain attack: Researchers reveal details, IoCs, targets
Rapid7 researchers have attributed the recent hijacking of the Notepad++ update mechanism to Lotus Blossom (aka Billbug), a Chinese state-sponsored group known for targeting …
WinRAR vulnerability still a go-to tool for hackers, Mandiant warns
State-sponsored hackers and financially motivated attackers continue leveraging a critical WinRAR vulnerability (CVE-2025-8088) that’s been fixed over half a year ago. …
Poland repels data-wiping malware attack on energy systems
Suspected Russian cyber attackers tried to take down parts of Poland’s energy infrastructure with new data-wiping malware – and failed. According to information shared …
Cisco fixes AsyncOS vulnerability exploited in zero-day attacks (CVE-2025-20393)
Cisco has finally shipped security updates for its Email Security Gateway and Secure Email and Web Manager devices, which fix CVE-2025-20393, a vulnerability in the …
Group Policy abuse reveals China-aligned espionage group targeting governments
ESET Research has identified a previously undocumented China-aligned advanced persistent threat group that uses Windows Group Policy to deploy malware and move through victim …
Cisco email security appliances rooted and backdoored via still unpatched zero-day
A suspected Chinese-nexus threat group has been compromising Cisco email security devices and planting backdoors and log-purging tools on them since at least late November …
Massive gambling network doubles as hidden C2 and anonymity infrastructure, researchers say
A sprawling network that’s seemingly maintained to serve (illegal) online gambling opportunities and deliver malware to Indonesian citizens is likely also being used to …
How a noisy ransomware intrusion exposed a long-term espionage foothold
Getting breached by two separate and likely unconnected cyber attack groups is a nightmare scenario for any organization, but can result in an unexpected silver lining: the …
Russia-linked hackers intensify attacks as global APT activity shifts
State-aligned hacking groups have spent the past six months ramping up espionage, sabotage, and cybercrime campaigns across multiple regions, according to ESET’s APT Activity …
Google uncovers malware using LLMs to operate and evade detection
PromptLock, the AI-powered proof-of-concept ransomware developed by researchers at NYU Tandon and initially mistaken for an active threat by ESET, is no longer an isolated …
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