Researchers Reveal Reprompt Attack Allowing Single-Click Data Exfiltration From Microsoft Copilot

Ravie LakshmananJan 15, 2026Prompt Injection / Enterprise Security Cybersecurity researchers have disclosed details of a new attack method dubbed Reprompt that could allow bad actors to exfiltrate sensitive data from artificial intelligence (AI) chatbots like Microsoft Copilot in a single click, while bypassing enterprise security controls entirely. “Only a single click on a legitimate Microsoft…

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Fortinet Fixes Critical FortiSIEM Flaw Allowing Unauthenticated Remote Code Execution

Ravie LakshmananJan 14, 2026Vulnerability / Patch Management Fortinet has released updates to fix a critical security flaw impacting FortiSIEM that could allow an unauthenticated attacker to achieve code execution on susceptible instances. The operating system (OS) injection vulnerability, tracked as CVE-2025-64155, is rated 9.4 out of 10.0 on the CVSS scoring system. “An improper neutralization…

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CSA Issues Alert on Critical SmarterMail Bug Allowing Remote Code Execution

Dec 30, 2025Ravie LakshmananVulnerability / Email Security The Cyber Security Agency of Singapore (CSA) has issued a bulletin warning of a maximum-severity security flaw in SmarterTools SmarterMail email software that could be exploited to achieve remote code execution. The vulnerability, tracked as CVE-2025-52691, carries a CVSS score of 10.0. It relates to a case of…

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VolkLocker Ransomware Exposed by Hard-Coded Master Key Allowing Free Decryption

Dec 15, 2025Ravie LakshmananRansomware / Cybercrime The pro-Russian hacktivist group known as CyberVolk (aka GLORIAMIST) has resurfaced with a new ransomware-as-a-service (RaaS) offering called VolkLocker that suffers from implementation lapses in test artifacts, allowing users to decrypt files without paying an extortion fee. According to SentinelOne, VolkLocker (aka CyberVolk 2.x) emerged in August 2025 and…

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