Oct 25, 2023NewsroomThreat Intelligence / Vulnerability The threat actor known as Winter Vivern has been observed exploiting a zero-day flaw in Roundcube webmail software on October 11, 2023, to harvest email messages from victims' accounts. "Winter Vivern has stepped up its operations by using a zero-day vulnerability in Roundcube," ESET security researcher Matthieu Faou … [Read more...] about Nation State Hackers Exploiting Zero-Day in Roundcube Webmail Software
ZeroDay
Cisco Zero-Day Exploited to Implant Malicious Lua Backdoor on Thousands of Devices
Oct 21, 2023NewsroomZero-Day / Vulnerability Cisco has warned of a new zero-day flaw in IOS XE that has been actively exploited by an unknown threat actor to deploy a malicious Lua-based implant on susceptible devices. Tracked as CVE-2023-20273 (CVSS score: 7.2), the issue relates to a privilege escalation flaw in the web UI feature and is said to have been used alongside … [Read more...] about Cisco Zero-Day Exploited to Implant Malicious Lua Backdoor on Thousands of Devices
Falcon Complete: Zero-Day Exploit Case Study
CrowdStrike Counter Adversary Operations is committed to analyzing active exploitation campaigns and detecting and blocking zero-days to protect our customers. In July 2023, the CrowdStrike Falcon® Complete managed detection and response (MDR) team discovered an unknown exploit kit leveraging a still-unknown vulnerability affecting the Windows Error Reporting (WER) component. … [Read more...] about Falcon Complete: Zero-Day Exploit Case Study
Zero-Day Alert: Google Issues Patch for New Chrome Vulnerability
Jun 06, 2023Ravie LakshmananBrowser Security / Vulnerability Google on Monday released security updates to patch a high-severity flaw in its Chrome web browser that it said is being actively exploited in the wild. Tracked as CVE-2023-3079, the vulnerability has been described as a type confusion bug in the V8 JavaScript engine. Clement Lecigne of Google's Threat Analysis … [Read more...] about Zero-Day Alert: Google Issues Patch for New Chrome Vulnerability
Google Releases Urgent Chrome Update to Fix Actively Exploited Zero-Day Vulnerability
Apr 15, 2023Ravie LakshmananZero-Day / Browser Security Google on Friday released out-of-band updates to resolve an actively exploited zero-day flaw in its Chrome web browser, making it the first such bug to be addressed since the start of the year. Tracked as CVE-2023-2033, the high-severity vulnerability has been described as a type confusion issue in the V8 JavaScript … [Read more...] about Google Releases Urgent Chrome Update to Fix Actively Exploited Zero-Day Vulnerability
55 Zero-Day Vulnerabilities Weaponized in 2022
Mar 21, 2023Ravie LakshmananCyber Threat Intel / Vulnerability As many as 55 zero-day vulnerabilities were exploited in the wild in 2022, with most of the flaws discovered in software from Microsoft, Google, and Apple. While this figure represents a decrease from the year before, when a staggering 81 zero-days were weaponized, it still represents a significant uptick in … [Read more...] about 55 Zero-Day Vulnerabilities Weaponized in 2022
Chinese Hackers Exploit Fortinet Zero-Day Flaw for Cyber Espionage Attack
Mar 18, 2023Ravie LakshmananNetwork Security / Cyber Espionage The zero-day exploitation of a now-patched medium-severity security flaw in the Fortinet FortiOS operating system has been linked to a suspected Chinese hacking group. Threat intelligence firm Mandiant, which made the attribution, said the activity cluster is part of a broader campaign designed to deploy backdoors … [Read more...] about Chinese Hackers Exploit Fortinet Zero-Day Flaw for Cyber Espionage Attack
Microsoft Issues January 2023 Patch Tuesday Updates, Warns of Zero-Day Exploit
The first Patch Tuesday fixes shipped by Microsoft for 2023 have addressed a total of 98 security flaws, including one bug that the company said is being actively exploited in the wild. 11 of the 98 issues are rated Critical and 87 are rated Important in severity, with one of the vulnerabilities also listed as publicly known at the time of release. Separately, the Windows maker … [Read more...] about Microsoft Issues January 2023 Patch Tuesday Updates, Warns of Zero-Day Exploit
Google Warns of Internet Explorer Zero-Day Vulnerability Exploited by ScarCruft Hackers
Dec 08, 2022Ravie LakshmananPatch Management / Zero-Day An Internet Explorer zero-day vulnerability was actively exploited by a North Korean threat actor to target South Korean users by capitalizing on the recent Itaewon Halloween crowd crush to trick users into downloading malware. The discovery, reported by Google Threat Analysis Group researchers Benoît Sevens and Clément … [Read more...] about Google Warns of Internet Explorer Zero-Day Vulnerability Exploited by ScarCruft Hackers
Google Rolls Out New Chrome Browser Update to Patch Yet Another Zero-Day Vulnerability
Search giant Google on Friday released an out-of-band security update to fix a new actively exploited zero-day flaw in its Chrome web browser. The high-severity flaw, tracked as CVE-2022-4262, concerns a type confusion bug in the V8 JavaScript engine. Clement Lecigne of Google's Threat Analysis Group (TAG) has been credited with reporting the issue on November 29, 2022. Type … [Read more...] about Google Rolls Out New Chrome Browser Update to Patch Yet Another Zero-Day Vulnerability