Stanislav Stoychev

Recent Linux LPE vulnerabilities highlight how limited telemetry delays detection and response. Linux systems sit at the center of modern infrastructure. They run production workloads, cloud platforms, development environments, and critical internal services. Because of that, they are often seen as stable and trustworthy by default. Recent Linux privilege escalation vulnerabilities, including Fragnesia (CVE-2026-46300), Dirty Frag (CVE-2026-43284, CVE-2026-43500), and Copy Fail...

The visibility problem we keep running into Most SIEM deployments follow a familiar pattern: collect logs, apply rules, generate alerts. That approach works, but it starts to break down in one area we regularly see during investigations - telling the difference between legitimate activity and attacker behavior when both look the same. Attackers are no longer relying on obviously malicious tools. They use valid credentials, built-in admin utilities, and approved access paths. From a logging...

There is a recurring assumption in many environments: if the SIEM is properly configured, detection is “solved.” In reality, SIEMs don’t detect threats - they execute logic. And that logic is only as good as the assumptions behind it. What we consistently observe in real-world incidents is not a lack of SIEM coverage, but a lack of detection engineering discipline. At CyberSift, this is one of the core areas we continuously invest in: expanding, validating, and maintaining detection rules as...