STONE-KNIGHT SECURITY

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. [...]

Security firm Sysdig says it has found what it believes is the first ransomware attack run from start to finish by an AI agent. Its Threat Research Team calls the operator JADEPUFFER and says a large language model handled the whole job: breaking in, stealing credentials, moving deeper into the network, then…

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a high-severity flaw impacting Microsoft SharePoint Server to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerability, tracked as CVE-2026-45659 (CVSS score: 8.8), is a case of…

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…

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 .

The recently discovered financially-motivated FortiBleed campaign has been attributed to INC and Lynx ransomware operations, indicating that the verified, stolen credentials were intended for follow-on intrusions. "An operator tied to FortiBleed's infrastructure was found actively working negotiation panels for both…

Attackers are hiding a data-stealing trojan inside fake exploit code aimed at the people who hunt bugs for a living. The malware, called ChocoPoC, travels in Python proof-of-concept (PoC) repositories on GitHub that claim to exploit hot new CVEs. Run one, and it quietly lifts your saved passwords, browser cookies,…

The massive FortiBleed credential theft campaign has been linked to the INC and Lynx ransomware operations, suggesting the stolen Fortinet credentials were intended to fuel future network intrusions. [...]

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…

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 .

A PoC exploit has been available since public disclosure, and the first exploitation attempts were observed last week. The post Cisco Confirms In-the-Wild Exploitation of Unified CM Vulnerability 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. [...]

Kubota North America Corporation disclosed that hackers had access to some of its network systems for more than a month earlier this year. [...]

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 .

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 investigation 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.

Microsoft has fixed a known issue causing the Copilot Chat or Copilot buttons in Classic Outlook to disappear for Windows users with the Copilot Chat (Basic) license. [...]

Cisco confirmed that attackers are now exploiting a Unified Communications Manager (Unified CM) vulnerability patched in early June. [...]

Identity lifecycle management was architected around a person with an employment record, a manager, and a departure date. AI agents have none of those. As autonomous principals proliferate across enterprise environments, the governance model built for humans develops structural blind spots that traditional IGA tools…

Anthropic said Tuesday night that its AI model called Claude Fable 5 is now widely available. The post Trump Administration Lifts Restrictions on Anthropic’s Claude Models After Cybersecurity Alarm appeared first on SecurityWeek .