STONE-KNIGHT SECURITY

A newly disclosed Linux kernel flaw called Bad Epoll (CVE-2026-46242) lets an ordinary user with no special access take full control of a machine as root. It affects Linux desktops, servers, and Android, and a fix is out. Bad Epoll sits in the same small stretch of kernel code where Anthropic's most powerful AI…

After gaining a foothold in thousands of Fortinet firewalls, the attackers are starting to monetize that access, and are also piling on a Nextcloud zero-day bug.

Threat actors associated with the Anubis ransomware operation have been observed exploiting the Citrix Bleed 2 (CVE-2025-5777) vulnerability to obtain initial access. "Although tactics differ between affiliates, common patterns emerged in tradecraft through use of legitimate Remote Management and Monitoring (RMM)…

CISA warned on Wednesday that attackers have begun exploiting a high-severity Microsoft SharePoint remote code execution vulnerability patched in May. [...]

Added to KEV 2026-07-01. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-29. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-25. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-25. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-23. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-23. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-23. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-23. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-18. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-16. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-15. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-15. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-12. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Added to KEV 2026-06-11. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…

Cybersecurity researchers have discovered a previously undocumented modular malware framework codenamed Avalon that's distributed by means of a multi-stage phishing chain capable of bypassing traditional security controls. Avalon combines credential collection, lateral movement, remote access, recovery disruption,…

A new phishing-as-a-service (PhaaS) platform dubbed "ARToken" appears to operate as an affiliate of the EvilTokens phishing platform, giving researchers a glimpse into an extensive toolkit designed to compromise Microsoft 365. [...]

A previously undocumented threat actor known as Armored Likho has been attributed to cyber attacks targeting government agencies and the electric power sector across Russia, Brazil, and Kazakhstan. "Armored Likho blends financially motivated campaigns targeting private individuals with targeted cyber espionage aimed…

Attack demonstrates how LLM agents can combine known exploitation techniques with real-time reasoning to automate complex, multi-stage intrusions. The post Agentic AI Used to Conduct Ransomware Attack via Langflow appeared first on SecurityWeek .

Cybersecurity researchers have flagged a new macOS information stealer called PamStealer that employs a series of clever tricks to infect systems and siphon sensitive data. The stealer, discovered by Jamf Threat Labs, is distributed as a compiled AppleScript (.scpt) file impersonating Maccy, a legitimate open-source…

The Federal Bureau of Investigation (FBI) said today it worked with industry partners to seize hundreds of domains associated with NetNut, a sprawling residential proxy service operated by the publicly-traded Israeli company Alarum Technologies [NASDAQ: ALAR]. The action comes roughly two weeks after KrebsOnSecurity…

The ransomware campaign relies on basic social engineering and stretches across multiple regions, including the US, Europe, Middle East, and elsewhere.

This week’s security news is mostly about weak spots. Browsers, bots, sandboxes, AI systems, and email flows all show the same problem in different ways. Everything looks normal until someone tests a small gap and finds a way through. This is not one big break. It is small permissions, weak checks, open systems, and…

The threat actor known as ToddyCat has been attributed to a new malware called Umbrij that's designed to gain surreptitious access to a victim's email correspondence via the Google API. "In this campaign, the attackers focused their attention on corporate email communications hosted on Gmail, targeting access…

Researchers say credentials harvested from hundreds of thousands of FortiGate firewalls are being used to facilitate ransomware attacks by the INC and Lynx operations. The post FortiBleed Campaign Linked to INC, Lynx Ransomware Attacks appeared first on SecurityWeek .

Attackers fingerprint victims through user-agent data to deliver OS-specific payloads, increasing compromise rates and campaign profitability.

Researchers say the highly effective social engineering technique is no longer the exception for malware attacks — it's now the rule.

The group compromised at least 10 regional organizations, including two state-owned entities, and deployed a new backdoor.

For the past four years, a sprawling Android-based botnet called Popa has forced millions of consumer TV boxes to relay Internet traffic linked to advertising fraud, account takeovers, and mass data-scraping efforts. This week, researchers from multiple security firms concluded that the Popa botnet is linked to…

A cybercrime group known as The Gentlemen has emerged as the second most active ransomware gang by victim count, rapidly attracting a talented pool of hackers through an aggressive recruitment strategy that promises affiliates 90 percent of any ransom paid by victims. This post examines clues pointing to a real life…

Canadian authorities on Wednesday arrested a 23-year-old Ottawa man on suspicion of building and operating Kimwolf, a fast spreading Internet-of-Things botnet that enslaved millions of devices for use in a series of massive distributed denial-of-service (DDoS) attacks over the past six months. KrebsOnSecurity…

Security firm runZero has disclosed seven vulnerabilities in FatFs, a small filesystem library that lets a device read and write the FAT and exFAT formats used on USB drives and SD cards. The flaws matter because FatFs is nearly everywhere. It ships inside the firmware that runs security cameras, drones, industrial…

Threat actors with ties to North Korea have been linked to a fresh set of malicious npm packages that masquerade as Rollup polyfill tooling to facilitate remote access and data theft. According to JFrog, the packages "rollup-packages-polyfill-core" and "rollup-runtime-polyfill-core" mimic the legitimate…

In April, ShinyHunters accessed the company’s corporate IT systems and stole patients’ personal and medical information. The post Medtronic Data Breach Impacts 3.8 Million People appeared first on SecurityWeek .

Hackers are targeting NetScaler appliances using public PoC code to retrieve arbitrary memory content in the HTTP response. The post New CitrixBleed Vulnerability Exploited Immediately After Public Disclosure appeared first on SecurityWeek .

Healthcare device firm Medtronic is notifying affected customers about a data breach that exposed their personal data to an unauthorized third party. [...]

A complaint unsealed this week accuses a 19-year-old of participating in incidents including a breach of a "luxury-jewelry retailer" in 2025.

Lawmakers in both houses of Congress are demanding answers from the U.S. Cybersecurity & Infrastructure Security Agency (CISA) after KrebsOnSecurity reported this week that a CISA contractor intentionally published AWS GovCloud keys and a vast trove of other agency secrets on a public GitHub account. The inquiry…

Until this past weekend, a contractor for the Cybersecurity & Infrastructure Security Agency (CISA) maintained a public GitHub repository that exposed credentials to several highly privileged AWS GovCloud accounts and a large number of internal CISA systems. Security experts said the public archive included files…

NetNut rented access to millions of compromised devices, allowing cybercriminals and nation-state actors to mask their identities during attacks. The post Google, FBI Disrupt NetNut Residential Proxy Network Powered by Millions of Devices appeared first on SecurityWeek .

A joint operation involving Google has disrupted NetNut, a residential proxy network that gave access to millions of compromised Android devices, including smart TVs and streaming boxes. [...]

Noteworthy stories that might have slipped under the radar: Anonymous-linked Canadian hacker jailed, researcher drops zero-days in open source projects, Venezuelans sentenced in the US over ATM jackpotting. The post In Other News: Canadian Hacker Jailed, Open Source Zero-Days, Two Sentenced for ATM Jackpotting…

Two new models from Chinese firms compete with top US mainstream and frontier models. Should cyber-defenders be worried?

A new report from the Citizen Lab has revealed that former Member of the European Parliament Stelios Kouloglou had his mobile device repeatedly hacked with the notorious Pegasus spyware while serving on a committee that was tasked with investigating the abuse of such commercial surveillance tools in the bloc.…

Prosecutors say 19-year-old Peter Stokes was a member of Scattered Spider, the hacking group linked to more than 100 network intrusions and over $100 million in ransom payments. The post Alleged Scattered Spider Hacker Extradited to US appeared first on SecurityWeek .

The DuneSlide vulnerabilities enable zero-click prompt injection attacks that escape Cursor's sandbox and execute arbitrary code on the underlying operating system. The post Critical Cursor AI Code Editor Flaws Could Lead to OS-Level Remote Code Execution appeared first on SecurityWeek .

Stelios Kouloglou, formerly a member of the European Parliament's committee investigating abuses of commercial spyware, was twice infected with Pegasus while serving, researchers said.

Anthropic says Claude Fable 5 won't be accessible via Claude subscriptions after July 7, but it's not a permanent change, and the company expects the model to return outside the usage-based plan soon. [...]

Claude Fable, the company's most powerful model, is now available to all users, but early impressions are disappointing, as it appears to be nowhere near the original release. [...]

Improved institutional safeguards and stricter regulations have pushed the burdens of protection and risk reduction on to Australian businesses.

The plan had been due for publication on Monday, the sources said. It has been postponed amid the uncertainty over the governing Labour Party’s leadership contest, which opens July 9.

Expect more compressed patching cycles from Apple going forward, as attackers leverage artificial intelligence to reduce time to exploit.

Google has significantly degraded NetNut, one of the biggest networks that turns home devices into rented relays for other people's traffic. Working with the FBI, Lumen, and others, Google's Threat Intelligence Group (GTIG) said this week it had reduced the network's pool of usable devices by millions. Google…

In a Tuesday letter, Max Schrems, the founder of the Vienna-based privacy advocacy organization noyb, told European officials he plans to sue to invalidate the EU-U.S. Data Privacy Framework (DPF) that allows for the transfer of personal data from the EU to U.S. companies.

Court of Justice of the European Union (CJEU) has dismissed Google's final appeal against a €4.1 billion ($4.7 billion) antitrust fine over the company's use of Android to promote its Chrome browser and search service. [...]

ConsentFix and ClickFix attacks steal Microsoft 365 tokens in seconds using fake prompts and OAuth flows. Learn how these MFA bypass tactics work and how to defend against them. [...]

As AI-generated code becomes commonplace, CISOs need new audit strategies to measure developer practices, govern AI tool usage, and identify software risks before they reach production. The post How to Conduct a Successful Audit of AI-Driven Software Development appeared first on SecurityWeek .

IBM and Red Hat assign 20,000 engineers to the new Project Lightwell service as Anthropic's Mythos findings ignite debate over how to secure the open-source software supply chain.