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Vulnerability Analysis

FortiGate SSL-VPN Zero-Day (CVE-2022-42475): How a Heap Overflow Gave Attackers the Keys

A heap-based buffer overflow in Fortinet's SSL-VPN was actively exploited before disclosure. State-sponsored actors used it to deploy custom implants on critical infrastructure.

Dec 12, 20226 min read
Vulnerability Analysis

Follina (CVE-2022-30190): The Microsoft Zero-Day That Bypassed Macro Protections

A Word document, no macros enabled, and full remote code execution. Follina exploited the Microsoft Support Diagnostic Tool via ms-msdt protocol handlers, rendering years of macro-blocking defenses irrelevant.

Jun 10, 20227 min read
Vulnerability Analysis

Confluence Zero-Day (CVE-2022-26134): Atlassian's OGNL Injection Crisis

An unauthenticated RCE zero-day in Confluence Server was being actively exploited before Atlassian even knew about it. The vulnerability affected virtually every on-premise Confluence installation.

Jun 3, 20225 min read
Vulnerability Analysis

Log4Shell Vulnerability (CVE-2021-44228) Explained

The most critical vulnerability in a decade dropped on a Friday. Log4Shell affects virtually every Java application and is trivial to exploit. Here's what happened.

Dec 13, 20215 min read
Vulnerability Research

Zero-Day Vulnerabilities in Open Source: 2021 in Review

2021 saw a record number of zero-day exploits targeting open-source software. From Log4Shell to ProxyShell, here's what happened and what it means for defenders.

Nov 28, 20217 min read
Zero-Day Exploits

Microsoft Exchange HAFNIUM Attack: Four Zero-Days That Compromised 30,000 Organizations

Chinese state-sponsored group HAFNIUM exploited four zero-day vulnerabilities in Microsoft Exchange Server, compromising an estimated 30,000 US organizations and hundreds of thousands globally.

Jun 20, 20215 min read
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