Category: Application Security

  • Defending Against React2Shell: CVE-2025-55182

    CVE-2025-55182, commonly referred to as React2Shell, is a critical pre-authentication remote code execution (RCE) flaw impacting React Server Components (RSC), Next.js, and related frameworks. The bug sits in the way affected versions parse and trust serialized payloads sent via the Flight protocol. With a CVSS score of 10.0, the vulnerability allows a single HTTP request…

  • What SMBs Miss When They Rely Only on Automated Security Tools

    Small and mid-sized businesses increasingly depend on automated security tools to defend their environments. Endpoint agents, vulnerability scanners, cloud security dashboards, and automated alerting platforms promise broad coverage with minimal staffing. For organizations under cost pressure, automation feels like a rational tradeoff. The issue is not that these tools lack value; it is that automation…

  • Netizen: Monday Security Brief (12/22/2025)

    Today’s Topics: Cisco AsyncOS Zero-Day Actively Exploited in Targeted Email Gateway Intrusions Cisco has issued an urgent warning regarding an actively exploited, maximum-severity zero-day vulnerability affecting Cisco AsyncOS software used by Cisco Secure Email Gateway (SEG) and Cisco Secure Email and Web Manager appliances. The flaw, tracked as CVE-2025-20393 with a CVSS score of 10.0,…

  • Security-as-a-Service and the Problem of Fragmented Tooling

    Security teams often begin with a simple set of tools that match the size of their environment. Over time, though, new cloud platforms, business applications, and compliance obligations introduce more alerts, more data, and more risks. Each new challenge tends to bring another vendor product into the stack. Before long, the security program is made…

  • Why CBP Is Treating Quantum Threats as a Present-Day National Security Risk

    U.S. Customs and Border Protection is moving into a decisive phase of its quantum preparedness program as it approaches 2026. Senior leadership has framed this effort as a necessary response to long-term cryptographic risk rather than a speculative research exercise. The focus centers on protecting sensitive government data against future cryptanalytic breakthroughs tied to large-scale…

  • What Is a Rootkit?

    A rootkit is a class of post-exploitation malware built to preserve long-term, privileged access to a compromised system while actively concealing its presence. Unlike most malware families that prioritize immediate payload execution or data theft, a rootkit exists to subvert visibility itself. It alters how an operating system reports processes, files, memory, network activity, and…

  • Netizen: Monday Security Brief (12/15/2025)

    Today’s Topics: Featured Browser Extensions Caught Harvesting AI Chat Data at Scale A Chrome browser extension promoted as a trusted, “Featured” tool has been caught quietly collecting AI chat conversations at massive scale, raising serious questions about extension marketplace oversight and user consent in AI-heavy workflows. Urban VPN Proxy, a Chrome extension with roughly six…

  • Microsoft December 2025 Patch Tuesday Fixes 57 Flaws, Including Three Zero-Days

    Microsoft’s December 2025 Patch Tuesday includes fixes for 57 vulnerabilities, including one actively exploited zero-day and two publicly disclosed zero-days. Three of the patched flaws are classified as critical, all tied to remote code execution. Breakdown of Vulnerabilities These totals do not include 15 Microsoft Edge vulnerabilities or Mariner fixes that were released earlier in…

  • Netizen: Monday Security Brief (12/8/2025)

    Today’s Topics: Detecting React2Shell: What Security Teams Should Be Watching for Right Now Since the disclosure of CVE-2025-55182 on December 3, 2025, most of the attention around React2Shell has centered on patching timelines and framework exposure. That is necessary, but for many environments, detection is the real safety net while fixes are staged, tested, and…

  • Chinese Threat Groups Move Fast on Newly Disclosed React2Shell Vulnerability

    A critical vulnerability known as React2Shell affects React Server Components, allowing remote code execution. Following its disclosure, attackers from groups like Earth Lamia and Jackpot Panda quickly attempted exploitations. Despite patches, attacks were observed. Concurrently, Cloudflare faced a service outage tied to an internal update, impacting major sites while Netizen offers cybersecurity services to enhance…