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Citrix has released fixes to address three security flaws in NetScaler ADC and NetScaler Gateway, including one that it said has been actively exploited in the wild. The vulnerabilities in question are listed below - CVE-2025-7775 (CVSS score: 9.2) - Memory overflow vulnerability leading to Remote Code Execution and/or Denial-of-Service CVE-2025-7776 (CVSS score: 8.8) - Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial-of-Service CVE-2025-8424 (CVSS score: 8.7) - Improper access control on the NetScaler Management Interface The company acknowledged that "exploits of CVE-2025-7775 on unmitigated appliances have been observed," but stopped short of sharing additional details. However, for the flaws to be exploited, there are a number of prerequisites - CVE-2025-7775 - NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server; NetScaler ADC and NetScaler Gateway 13.1, 14.1...

A team of academics has devised a novel attack that can be used to downgrade a 5G connection to a lower generation without relying on a rogue base station (gNB). The attack , per the ASSET (Automated Systems SEcuriTy) Research Group at the Singapore University of Technology and Design (SUTD), relies on a new open-source software toolkit named Sni5Gect (short for "Sniffing 5G Inject") that's designed to sniff unencrypted messages sent between the base station and the user equipment (UE, i.e., a phone) and inject messages to the target UE over-the-air. The framework can be used to carry out attacks such as crashing the UE modem, downgrading to earlier generations of networks, fingerprinting, or authentication bypass, according to Shijie Luo, Matheus Garbelini, Sudipta Chattopadhyay, and Jianying Zhou. "As opposed to using a rogue base station, which limits the practicality of many 5G attacks, SNI5GECT acts as a third-party in the communication, silently sniffs me...

Cybersecurity researchers are calling attention to a sophisticated social engineering campaign that's targeting supply chain-critical manufacturing companies with an in-memory malware dubbed MixShell. The activity has been codenamed ZipLine by Check Point Research. "Instead of sending unsolicited phishing emails, attackers initiate contact through a company's public 'Contact Us' form, tricking employees into starting the conversation," the company said in a statement shared with The Hacker News. "What follows are weeks of professional, credible exchanges, often sealed with fake NDAs, before delivering a weaponized ZIP file carrying MixShell, a stealthy in-memory malware." The attacks have cast a wide net, spanning multiple organizations across sectors and geographic locations, but with an emphasis on U.S.-based entities. Primary targets include companies in industrial manufacturing, such as machinery, metalwork, component production, and engine...

A new large-scale campaign has been observed exploiting over 100 compromised WordPress sites to direct site visitors to fake CAPTCHA verification pages that employ the ClickFix social engineering tactic to deliver information stealers, ransomware, and cryptocurrency miners. The large-scale cybercrime campaign, first detected in August 2025, has been codenamed ShadowCaptcha by the Israel National Digital Agency. "The campaign [...] blends social engineering, living-off-the-land binaries (LOLBins), and multi-stage payload delivery to gain and maintain a foothold in targeted systems," researchers Shimi Cohen, Adi Pick, Idan Beit Yosef, Hila David, and Yaniv Goldman said . "The ultimate objectives of ShadowCaptcha are collecting sensitive information through credential harvesting and browser data exfiltration, deploying cryptocurrency miners to generate illicit profits, and even causing ransomware outbreaks." The attacks begin with unsuspecting users visiting a c...

Cybersecurity researchers have discovered a new variant of an Android banking trojan called HOOK that features ransomware-style overlay screens to display extortion messages. "A prominent characteristic of the latest variant is its capacity to deploy a full-screen ransomware overlay, which aims to coerce the victim into remitting a ransom payment," Zimperium zLabs researcher Vishnu Pratapagiri said . "This overlay presents an alarming '*WARNING*' message, alongside a wallet address and amount, both of which are dynamically retrieved from the command-and-control server." The mobile security company said the overlay is remotely initiated when the command "ransome" is issued by the C2 server. The overlay can be dismissed by the attacker by sending the "delete_ransome" command. HOOK is assessed to be an offshoot of the ERMAC banking trojan, which, coincidentally, had its source code leaked on a publicly accessible directory over the int...