HOLLOWGRAPH: Turning Microsoft 365 Calendars into Covert Command-and-Control Channels

The Group-IB Threat Intelligence team has identified HOLLOWGRAPH, a new malware sample that we attribute, with high confidence, to the Cavern backdoor framework. This malware is one component of a larger toolkit, and it uses the Microsoft Graph API through a Read More …

Healthcare giant Abbott probes two cyber incidents amid extortion claims

Abbott Laboratories, one of the world’s largest healthcare and medical device companies, is investigating two apparently unrelated cyber incidents after confirming unauthorized access to internal systems. While Abbott says there has been no impact on manufacturing, laboratory operations, or patient Read More …

Three Steps to the Terminal: A Siemens ROX II Zero-Day Trilogy

Palo Alto Unit 42 conducted this research in close partnership with Siemens, reflecting their shared commitment to advancing the security and resilience of critical infrastructure. This report details a critical, chained exploit comprising three zero-day vulnerabilities (CVE-2025-40948, CVE-2025-40947, and CVE-2025-40949) Read More …

Hackers breached DHS after alarms were twice ruled ‘false positives’

Hackers managed to find their way into the US Department of Homeland Security’s primary information sharing platform, gaining unfettered access to the HSIN network that hosts unclassified information that multiple US agencies and international rely on. The hack allowed the Read More …

Shark vacuum flaw exposes cameras, home maps and Wi-Fi passwords

Shark’s cloud-connected robot vacuums are currently exposed by an unpatched AWS (Amazon Web Services) IoT (Internet of Things) policy flaw that could turn one compromised device into a remote-control skeleton key for many others in the same region, with access Read More …

Attackers target critical FortiSandbox flaws as CISA issues patch order

Fortinet admins have two more reasons to clear their calendars after CISA confirmed a pair of critical FortiSandbox bugs are being actively exploited. The two bugs, tracked as CVE-2026-39808 and CVE-2026-25089, both carry CVSS scores of 9.1 and affect FortiSandbox, Read More …

Nichirei getting back online after cyberattack hit KFC supplies

Nichirei, the food distributor hit by a cyberattack that disrupted supplies to Kentucky Fried Chicken Japan and other outlets, said its systems are getting back online as it takes steps to remedy the disruption. The Tokyo-based provider of frozen food, ice and Read More …

GoSerpent: a persistent threat evolves with sophisticated data collection and exfiltration

In February 2026, Kaspersky discovered a set of malicious activities that had been ongoing since late 2025. These activities involved a RAT module written in Go with proxy capabilities, which served as the main stage of the attack. The attack Read More …

Coca-Cola suspended production at its Fairlife dairy after a ransomware attack

U.S. beverage maker Coca-Cola said one of its dairy subsidiaries was hacked and that it’s shutting down its operations for the foreseeable future. The multinational giant said in a disclosure with the U.S. Securities and Exchange Commission that its Fairlife dairy company Read More …

Tech support scam caused massive data breach at Australian airline Qantas

Australia’s Privacy Commissioner has revealed a tech support scam was the cause of the massive 2025 data breach at Australian airline Qantas and found the carrier didn’t breach its privacy obligations despite leaking personally identifiable information for 5.7 million customers. Read More …