STONE-KNIGHT SECURITY

CVE-2026-20245, the 7th Cisco SD-WAN vulnerability exploited in 2026, was used for months prior to its disclosure and patching. The post Cisco SD-WAN Zero-Day Exploited Months Before Patching appeared first on SecurityWeek .

An unknown threat actor exploited a recently disclosed high-severity security flaw impacting Cisco Catalyst SD-WAN as a zero-day at least two months before it was publicly disclosed, according to new findings from Google-owned Mandiant. The vulnerability, tracked as CVE-2026-20245 (CVSS score: 7.8), allows an…

New details have been revealed on how hackers exploited a Cisco Catalyst SD-WAN vulnerability tracked as CVE-2026-20245 in zero-day attacks to create rogue root accounts on targeted devices. [...]

Threat actors have begun to exploit a recently disclosed critical security flaw impacting Cisco Unified Communications Manager (Unified CM) and Unified Communications Manager Session Management Edition (Unified CM SME). The vulnerability, tracked as CVE-2026-20230 (CVSS score: 8.6), is a case of improper input…

A high-severity SSRF vulnerability, tracked as CVE-2026-20230, in Cisco Unified Communications Manager Server is now being exploited in attacks. [...]

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…

Microsoft today released software updates to plug nearly 200 security holes across its Windows operating systems and supported software, a record number of fixes for the company's monthly Patch Tuesday cycle. Nearly three dozen of those bugs earned Microsoft's most dire "critical" rating, and exploit code for at…

Added to KEV 2026-06-09. Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. by 2026-06-23. Google Chromium V8 out-of-bounds read and write vulnerability that could allow a remote attacker to execute…

Added to KEV 2026-06-09. Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. by 2026-06-23. Arista Extensible Operating System (EOS) contains an incomplete comparison with missing factors vulnerability when…

After a global lull, ransomware gangs are setting sights on a rich new arena: attacking EU organizations and their suppliers.

A previously undocumented Rust-based macOS implant and information stealer has been found to embed a prompt injection payload designed to trick a malware analyst's artificial intelligence (AI) tools and trick it into aborting or refusing an analysis of the artifact. The malware has been codenamed Gaslight owing to…

A new, stealthy backdoor named Mistic has been deployed as part of suspected financially motivated attacks aimed at multiple organizations spanning insurance, education, IT, and professional services sectors since April 2026. According to Symantec and Carbon Black's Threat Hunter Team, the backdoor, also tracked as…

A malicious Microsoft Edge extension dubbed 'Edgecution' has been used in a ransomware attack to escape the browser sandbox and deploy a Python-based backdoor. [...]

Microsoft touted its latest action against malware infrastructure as a new approach aimed at the full cybercrime "supply chain." Europol said more than 300 servers were targeted.

A coordinated law enforcement operation, in partnership with private sector companies, including Bitdefender, Bitsight, ESET, and Microsoft, has resulted in the takedown of criminal infrastructure powering Amadey and StealC. "The main common goal was to disrupt the 'assembly lines' cybercriminals use to launch…

Hundreds of C&C servers were disrupted in an operation involving law enforcement and several cybersecurity companies. The post Microsoft and Allies Smash Shared Infrastructure of Amadey and StealC Malware appeared first on SecurityWeek .

Microsoft, Europol, and international partners have disrupted infrastructure used by the Amadey and StealC malware operations as part of Operation Endgame, which targets cybercriminal services and ransomware gangs. [...]

The company said in a regulatory filing that it became aware of the incident on Tuesday morning and had taken precautionary measures to contain its impact.

A new backdoor dubbed Mistic has been observed in financially motivated attacks targeting organizations in the insurance, education, IT, and professional services sectors. [...]

Healthcare technology company Xsolis says that sensitive data belonging to nearly 1.4 million individuals was compromised in a phishing attack that gave attackers access to its network. [...]

A Russian-speaking initial access broker (IAB) driven by financial gain is assessed to be behind a large-scale credential-harvesting operation known as FortiBleed that has targeted over 430,000 FortiGate firewalls globally. The campaign, active since February 2026, involves collecting credential lists, searching for…

The threat actors engineered a Golang-based sniffer to target 430,000 FortiGate firewalls and identify 110 million credentials in the ongoing global campaign.

Attackers are using multiple online channels — including GitHub, YouTube, and VirusTotal — to build an illusion of trust to spread a cross-platform clipboard hijacker.

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…

Researchers believe rogue peering was used to connect to the victim's SD-WAN devices to gain admin privileges and root-level access.

Tata Electronics has confirmed in a statement to BleepingComputer that it was the target of a cyberattack that impacted parts of its IT infrastructure. [...]

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…

The latest version of the open source data transfer tool resolves 18 medium and low-severity vulnerabilities. The post 25-Year-Old Vulnerability Patched in Curl appeared first on SecurityWeek .

The guidance aims to establish product cybersecurity requirements for IoT devices integrated into federal agencies’ networks. The post NIST Opens Updated IoT Security Guidance to Public Review appeared first on SecurityWeek .

More than half of the bugs are use-after-free defects, which can potentially lead to remote code execution. The post Chrome 149 Update Resolves 18 Severe Vulnerabilities appeared first on SecurityWeek .

Google is rolling out new privacy controls for Search services and Google Play, giving you more control over saved history and personalized recommendations. [...]

A 21-year-old using the alias "Snoopy" was sentenced to 18 months in prison for his role in hacking DraftKings accounts in the November 2022 cyberattack. [...]

Persistent cybercrime, social engineering, and infrastructure threats continue to plague the FIFA 2026 World Cup across the US, Canada, and Mexico.

Dark Reading Confidential Episode 19: Kickbacks, no-show jobs, "dirty" VCs, and shelf ware — industry expert Robert "RSnake" Hansen explains why he thinks its time for a CISO code of ethics to ensure cybersecurity bosses aren't engaged in self-dealing that could risk enterprise, and even national, security.

From hidden content injections to cognitive state poisoning, attackers are turning trusted data sources into traps for autonomous AI. The post When Information Becomes the Attack Surface – Understanding AI Agent Traps appeared first on SecurityWeek .

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday warned of active exploitation of a critical security flaw impacting Lantronix EDS5000 Series devices, urging Federal Civilian Executive Branch (FCEB) agencies to apply the fixes by June 26, 2026. The vulnerability in question is…

OpenClaw removed five packages from ClawHub, its skills marketplace, that bypassed security checks even though they included infostealers and other threats.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is warning of hackers actively exploiting flaws in Ubiquity UniFi OS and Lantronix serial-to-ethernet servers. [...]

The new framework seeks to help security teams identify which software supply chain vulnerabilities pose the greatest operational, safety, and business risks in AI-driven environments. The post Exclusive: Meet AIVEX, a New Triage Model Built to Reduce Supply Chain Threat and Risk appeared first on SecurityWeek .

Deutsche Bahn said a nationwide disruption of railway services was tied to a malfunction in its 2G-based GSM-R communications system.

Service desks have become a favored target for attackers seeking password resets, MFA changes, and access to corporate accounts. Specops Software breaks down how service desk social engineering attacks work and how organizations can defend against them. [...]

A standard non-admin account is sufficient to conduct an attack that exploits legitimate OS behavior rather than software vulnerabilities. The post macOS Weaknesses Chained to Silently Disable Endpoint Security Agents appeared first on SecurityWeek .

Nathan Austad has been ordered to pay roughly $1.8 million in forfeiture and restitution, and the sentence also includes 3 years of supervised release. The post Third DraftKings Hacker Sentenced to 18 Months in Prison appeared first on SecurityWeek .

Cybersecurity researchers have flagged a new class of CI/CD workflow weakness that allows attackers to hijack workflows and compromise open-source supply chains. The "critical exploitable pattern" has been codenamed Cordyceps by Novee Security. The issue can allow full attacker control of repositories at dozens of…

The flaws allow remote, unauthenticated attackers to make system changes, access underlying accounts, and inject commands. The post Critical Ubiquiti Vulnerabilities in Attackers’ Crosshairs appeared first on SecurityWeek .