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Cybersecurity researchers have taken the wraps off a gateway-monitoring and adversary-in-the-middle (AitM) framework dubbed DKnife that's operated by China-nexus threat actors since at least 2019. The framework comprises seven Linux-based implants that are designed to perform deep packet inspection, manipulate traffic, and deliver malware via routers and edge devices. Its primary targets seem to be Chinese-speaking users, an assessment based on the presence of credential harvesting phishing pages for Chinese email services, exfiltration modules for popular Chinese mobile applications like WeChat, and code references to Chinese media domains. "DKnife's attacks target a wide range of devices, including PCs, mobile devices, and Internet of Things (IoT) devices," Cisco Talos researcher Ashley Shen noted in a Thursday report. "It delivers and interacts with the ShadowPad and DarkNimbus backdoors by hijacking binary downloads and Android application updates....

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered Federal Civilian Executive Branch (FCEB) agencies to strengthen asset lifecycle management for edge network devices and remove those that no longer receive security updates from original equipment manufacturers (OEMs) over the next 12 to 18 months. The agency said the move is to drive down technical debt and minimize the risk of compromise, as state-sponsored threat actors turn such devices as a preferred access pathway for breaking into target networks. Edge devices is an umbrella term that encompasses load balancers, firewalls, routers, switches, wireless access points, network security appliances, Internet of Things (IoT) edge devices, software-defined networks, and other physical or virtual networking components that route network traffic and hold privileged access. "Persistent cyber threat actors are increasingly exploiting unsupported edge devices -- hardware and software that no longer receiv...

The CERT Coordination Center (CERT/CC) has disclosed details of an unpatched security flaw impacting TOTOLINK EX200 wireless range extender that could allow a remote authenticated attacker to gain full control of the device. The flaw, CVE-2025-65606 (CVSS score: N/A), has been characterized as a flaw in the firmware-upload error-handling logic, which could cause the device to inadvertently start an unauthenticated root-level telnet service. CERT/CC credited Leandro Kogan for discovering and reporting the issue.  "An authenticated attacker can trigger an error condition in the firmware-upload handler that causes the device to start an unauthenticated root telnet service, granting full system access," CERT/CC said . Successful exploitation of the flaw requires an attacker to be already authenticated to the web management interface to access the firmware-upload functionality. CERT/CC said the firmware-upload handler enters an "abnormal error state" when certain ...

The botnet known as Kimwolf has infected more than 2 million Android devices by tunneling through residential proxy networks, according to findings from Synthient. "Key actors involved in the Kimwolf botnet are observed monetizing the botnet through app installs, selling residential proxy bandwidth, and selling its DDoS functionality," the company said in an analysis published last week. Kimwolf was first publicly documented by QiAnXin XLab last month, while documenting its connections to another botnet known as AISURU. Active since at least August 2025, Kimwolf is assessed to be an Android variant of AISURU. There is growing evidence to suggest that the botnet is actually behind a series of record-setting DDoS attacks late last year. The malware turns infected systems into conduits for relaying malicious traffic and orchestrating distributed denial-of-service (DDoS) attacks at scale. The vast majority of the infections are concentrated in Vietnam, Brazil, India, and ...

This week’s ThreatsDay Bulletin tracks how attackers keep reshaping old tools and finding new angles in familiar systems. Small changes in tactics are stacking up fast, and each one hints at where the next big breach could come from. From shifting infrastructures to clever social hooks, the week’s activity shows just how fluid the threat landscape has become. Here’s the full rundown of what moved in the cyber world this week. International scam ring busted Fraudulent Call Centers Disrupted in Ukraine Authorities from the Czech Republic, Latvia, Lithuania, and Ukraine, along with Eurojust, took action against a criminal network operating call centers in Dnipro, Ivano-Frankivsk, and Kyiv that scammed more than 400 victims across Europe out of more than €10 million ($11.7 million). "The criminal group established a professional organisation with employees who received a percentage of the proceeds for each completed scam," Eur...

This week’s cyber stories show how fast the online world can turn risky. Hackers are sneaking malware into movie downloads, browser add-ons, and even software updates people trust. Tech giants and governments are racing to plug new holes while arguing over privacy and control. And researchers keep uncovering just how much of our digital life is still wide open. The new Threatsday Bulletin brings it all together—big hacks, quiet exploits, bold arrests, and smart discoveries that explain where cyber threats are headed next. It’s your quick, plain-spoken look at the week’s biggest security moves before they become tomorrow’s headlines. Maritime IoT under siege Mirai-Based Broadside Botnet Exploits TBK DVR Flaw A new Mirai botnet variant dubbed Broadside has been exploiting a critical-severity vulnerability in TBK DVR ( CVE-2024-3721 ) in attacks targeting the maritime logistics sector. "Unlike previous Mirai variants, Broadside e...

Think your Wi-Fi is safe? Your coding tools? Or even your favorite financial apps? This week proves again how hackers, companies, and governments are all locked in a nonstop race to outsmart each other. Here’s a quick rundown of the latest cyber stories that show how fast the game keeps changing. DeFi exploit drains funds Critical yETH Exploit Used to Steal $9M A critical exploit targeting Yearn Finance's yETH pool on Ethereum has been exploited by unknown threat actors, resulting in the theft of approximately $9 million from the protocol. The attack is said to have abused a flaw in how the protocol manages its internal accounting, stemming from the fact that a cache containing calculated values to save on gas fees was never cleared when the pool was completely emptied. "The attacker achieved this by minting an astronomical number of tokens – 235 septillion yETH (a 41-digit number) – while depositing only 16 wei, worth approxim...

Hackers have been busy again this week. From fake voice calls and AI-powered malware to huge money-laundering busts and new scams, there’s a lot happening in the cyber world. Criminals are getting creative — using smart tricks to steal data, sound real, and hide in plain sight. But they’re not the only ones moving fast. Governments and security teams are fighting back, shutting down fake networks, banning risky projects, and tightening digital defenses. Here’s a quick look at what’s making waves this week — the biggest hacks, the new threats, and the wins worth knowing about. Mirai-based malware resurfaces with new IoT campaign ShadowV2 Botnet Continues to Target IoT Devices The threat actors behind the Mirai-based ShadowV2 botnet have been observed infecting IoT devices across industries and continents. The campaign is said to have been active only during the Amazon Web Services (AWS) outage in late October 2025. It's assessed ...

A newly discovered campaign has compromised tens of thousands of outdated or end-of-life (EoL) ASUS routers worldwide, predominantly in Taiwan, the U.S., and Russia, to rope them into a massive network. The router hijacking activity has been codenamed Operation WrtHug by SecurityScorecard's STRIKE team. Southeast Asia and European countries are some of the other regions where infections have been recorded. Over the past six months, more than 50,000 unique IP addresses belonging to these compromised devices around the globe have been identified. The attacks likely involve the exploitation of six known security flaws in end-of-life ASUS WRT routers to take control of susceptible devices. All the infected routers have been found to share a unique self-signed TLS certificate with an expiration date set for 100 years from April 2022. SecurityScorecard said 99% of the services presenting the certificate are ASUS AiCloud, a proprietary service designed to enable access to local stora...

Microsoft on Monday disclosed that it automatically detected and neutralized a distributed denial-of-service (DDoS) attack targeting a single endpoint in Australia that measured 15.72 terabits per second (Tbps) and nearly 3.64 billion packets per second (pps). The tech giant said it was the largest DDoS attack ever observed in the cloud, and that it originated from a TurboMirai-class Internet of Things (IoT) botnet known as AISURU . It's currently not known who was targeted by the attack. "The attack involved extremely high-rate UDP floods targeting a specific public IP address, launched from over 500,000 source IPs across various regions," Microsoft's Sean Whalen said . "These sudden UDP bursts had minimal source spoofing and used random source ports, which helped simplify traceback and facilitated provider enforcement." According to data from QiAnXin XLab, the AISURU botnet is powered by nearly 300,000 infected devices, most of which are routers, se...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a high-severity security flaw impacting Smartbedded Meteobridge to its Known Exploited Vulnerabilities ( KEV ) catalog, citing evidence of active exploitation. The vulnerability, CVE-2025-4008 (CVSS score: 8.7), is a case of command injection in the Meteobridge web interface that could result in code execution. "Smartbedded Meteobridge contains a command injection vulnerability that could allow remote unauthenticated attackers to gain arbitrary command execution with elevated privileges (root) on affected devices," CISA Said. According to ONEKEY, which discovered and reported the issue in late February 2025, the Meteobridge web interface lets an administrator manage their weather station data collection and control the system through a web application written in CGI shell scripts and C. Specifically, the web interface exposes a "template.cgi" script through "/cgi-bin/tem...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added three old security flaws impacting D-Link Wi-Fi cameras and video recorders to its Known Exploited Vulnerabilities ( KEV ) catalog, based on evidence of active exploitation in the wild. The high-severity vulnerabilities, which are from 2020 and 2022, are listed below - CVE-2020-25078 (CVSS score: 7.5) - An unspecified vulnerability in D-Link DCS-2530L and DCS-2670L devices that could allow for remote administrator password disclosure CVE-2020-25079 (CVSS score: 8.8) - An authenticated command injection vulnerability in the cgi-bin/ddns_enc.cgi component affecting D-Link DCS-2530L and DCS-2670L devices CVE-2020-40799 (CVSS score: 8.8) - A download of code without an integrity check vulnerability in D-Link DNR-322L that could allow an authenticated attacker to execute operating system-level commands on the device There are currently no details on how these shortcomings are being exploited in th...

Cybersecurity researchers have discovered over a dozen security vulnerabilities impacting Tridium's Niagara Framework that could allow an attacker on the same network to compromise the system under certain circumstances. "These vulnerabilities are fully exploitable if a Niagara system is misconfigured, thereby disabling encryption on a specific network device," Nozomi Networks Labs said in a report published last week. "If chained together, they could allow an attacker with access to the same network — such as through a Man-in-the-Middle (MiTM) position — to compromise the Niagara system." Developed by Tridium, an independent business entity of Honeywell, the Niagara Framework is a vendor-neutral platform used to manage and control a wide range of devices from different manufacturers, such as HVAC, lighting, energy management, and security, making it a valuable solution in building management, industrial automation, and smart infrastructure environments. I...