A hacker is threatening to leak 106GB of data allegedly stolen from Spanish telecommunications company Telefónica in a breach that the company did not acknowledge. [...]

Vulnerabilities affecting a Bluetooth chipset present in more than two dozen audio devices from ten vendors can be exploited for eavesdropping or stealing sensitive information. [...]

A sophisticated malicious campaign that researchers call OneClik has been leveraging Microsoft's ClickOnce software deployment tool and custom Golang backdoors to compromise organizations within the energy, oil, and gas sectors. [...]

A cybersecurity researcher has developed FileFix, a variant of the ClickFix social engineering attack that tricks users into executing malicious commands via the File Explorer address bar in Windows. [...]

Russian hackers bypass multi-factor authentication and access Gmail accounts by leveraging app-specific passwords in advanced social engineering attacks that impersonate U.S. Department of State officials. [...]

Threat intelligence researchers are warning of hackers breaching multiple U.S. companies in the insurance industry using all the tactics observed with Scattered Spider activity. [...]