Search results for CVE-2021-40444 patch released Microsoft September 2021 Windows | Breaking Cybersecurity News | The Hacker News

A short-lived phishing campaign has been observed taking advantage of a novel exploit that bypassed a patch put in place by Microsoft to fix a remote code execution vulnerability affecting the MSHTML component with the goal of delivering Formbook malware. "The attachments represent an escalation of the attacker's abuse of the CVE-2021-40444 bug and demonstrate that even a patch can't always mitigate the actions of a motivated and sufficiently skilled attacker," SophosLabs researchers Andrew Brandt and Stephen Ormandy  said  in a new report published Tuesday. CVE-2021-40444  (CVSS score: 8.8) relates to a remote code execution flaw in MSHTML that could be exploited using specially crafted Microsoft Office documents. Although Microsoft addressed the security weakness as part of its September 2021  Patch Tuesday updates , it has been put to use in  multiple attacks  ever since details pertaining to the flaw became public. That same month, the technology g...

Unknown threat actors have been observed exploiting a now-patched security flaw in Microsoft MSHTML to deliver a surveillance tool called MerkSpy as part of a campaign primarily targeting users in Canada, India, Poland, and the U.S. "MerkSpy is designed to clandestinely monitor user activities, capture sensitive information, and establish persistence on compromised systems," Fortinet FortiGuard Labs researcher Cara Lin said in a report published last week. The starting point of the attack chain is a Microsoft Word document that ostensibly contains a job description for a software engineer role. But opening the file triggers the exploitation of CVE-2021-40444 , a high-severity flaw in MSHTML that could result in remote code execution without requiring any user interaction. It was addressed by Microsoft as part of Patch Tuesday updates released in September 2021. In this case, it paves the way for the download of an HTML file ("olerender.html") from a remote s...