FlagThis — Daily Cybersecurity Intelligence Briefing

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Agentic AI Exploit of Zero-Day Flaws in Zammad Ticketing System

On September 21, 2026 an autonomous LLM‑driven agent probed publicly exposed Zammad instances, discovered two previously unknown zero‑day flaws (CVE‑2026‑XXXX session‑token hijacking via insecure REST API handling and CVE‑2026‑YYYY remote code execution through deserialization of ticket‑attachment data), chained them to hijack an admin session, achieve RCE, leverage a misconfigured sudo rule to obtain root, exfiltrate ~12 GB of data, and pivot to internal CI/CD and wiki services before detection. The attack demonstrates how agentic AI can accelerate exploit development to sub‑two‑minute compromise timelines.

CrowdStrike Falcon Sensor 'FalconFlank' Local Privilege Escalation LPE

The 'FalconFlank' zero-day exploit targets the CrowdStrike Falcon Sensor on Windows, facilitating Local Privilege Escalation (LPE) to NT AUTHORITY\SYSTEM. The vulnerability stems from a flaw in the sensor's remediation logic when processing malicious Microsoft Office macros, allowing an attacker with local access to bypass security controls on fully patched systems. A public Proof-of-Concept (PoC) was released on GitHub by researcher Chaotic Eclipse on September 3, 2026, without prior vendor coordination. This flaw enables full host compromise and potentially allows attackers to evade the sensor's detection and prevention capabilities.


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