Inside an Underground Guide: How Threat Actors Vet Stolen Credit Card Shops

The underground market for stolen credit card data has long operated as a volatile and highly deceptive ecosystem, where even experienced actors routinely fall victim to scams, exit schemes, and compromised services. In recent years, this environment has become even more unstable, driven by increased law enforcement pressure, internal distrust among criminals, and the rapid […]

CISA flags Apache ActiveMQ flaw as actively exploited in attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned on Thursday that a high-severity Apache ActiveMQ vulnerability patched earlier this month is now actively exploited in attacks. Apache ActiveMQ is the most popular open-source Java-based message broker for asynchronous communication between applications. Tracked as CVE-2026-34197, the security flaw has gone undetected for 13 years and […]

Microsoft: Some Windows servers enter reboot loops after April patches

Microsoft has confirmed that some Windows domain controllers are entering restart loops due to Local Security Authority Subsystem Service (LSASS) crashes after installing the April 2026 security updates. The company also warned that Windows admins may encounter this issue when setting up new domain controllers, or even on existing ones, if the server processes authentication […]

Man gets 30 months for selling thousands of hacked DraftKings accounts

23-year-old Kamerin Stokes of Memphis, Tennessee, was sentenced to 30 months in prison for selling access to tens of thousands of hacked DraftKings accounts. According to court documents, the accounts were hijacked by Nathan Austad (aka Snoopy) with the help of Joseph Garrison (a third accomplice charged in May 2023) in a massive November 2022 credential-stuffing attack that compromised nearly 68,000 DraftKings accounts. U.S. prosecutors […]

Recently leaked Windows zero-days now exploited in attacks

Threat actors are exploiting three recently disclosed Windows security vulnerabilities in attacks aimed at gaining SYSTEM or elevated administrator permissions. Since the start of the month, a security researcher known as “Chaotic Eclipse” or “Nightmare-Eclipse” has published proof-of-concept exploit code for all three security issues in protest to how Microsoft’s Security Response Center (MSRC) handled […]

Operation PowerOFF identifies 75k DDoS users, takes down 53 domains

More than 75,000 individuals using distributed denial-of-service (DDoS) platforms for disruptive attacks have been warned through emails and letters during the latest phase of the Operation PowerOFF international law enforcement action. The ongoing operation is supported by Europol and involves authorities in 21 countries. Coordinated efforts led to the arrest of four people, taking offline […]

ZionSiphon malware designed to sabotage water treatment systems

A new malware called ZionSiphon, specifically designed for operational technology, is targeting water treatment and desalination environments to sabotage their operations. The threat can adjust hydraulic pressures and raise chlorine levels to dangerous levels, researchers found during their analysis. Based on its IP targeting and political messages embedded in its strings, ZionSiphon appears to focus […]

New Microsoft Defender “RedSun” zero-day PoC grants SYSTEM privileges

A researcher known as “Chaotic Eclipse” has published a proof-of-concept exploit for a second Microsoft Defender zero-day, dubbed “RedSun,” in the past two weeks, protesting how the company works with cybersecurity researchers. This exploit is for a local privilege escalation (LPE) flaw that grants SYSTEM privileges in Windows 10, Windows 11, and Windows Server on […]

Hackers exploit Marimo flaw to deploy NKAbuse malware from Hugging Face

Hackers are exploiting a critical vulnerability in Marimo reactive Python notebook to deploy a new variant of NKAbuse malware hosted on Hugging Face Spaces. Attacks leveraging the remote code execution flaw (CVE-2026-39987) started last week for credential theft, less than 10 hours after technical details were disclosed publicly, according to data from cloud-security company Sysdig. Sysdig researchers […]