Defcon Alerts Threat Monitor
Substack newsletter · by Defcon Level · English
Essential, No-Hype Alerts & Intelligence Reports
- Audience
- 15K subscribers
- Shown publicly on Substack
- Publishing
- Every two weeks
- 5 posts indexed in the last 90 days
- Last post
- Oct 21, 2026
- 8 days ago
- Likely audience
- Web developers
- Inferred from post content
Defcon Alerts Threat Monitor is a Substack newsletter by Defcon Level covering PHP security vulnerabilities, Remote code execution and CISA alerts. NewsletterFIT indexed 5 posts from it in the last 90 days, most recently on Oct 21, 2026. Shown publicly on Substack: 15K subscribers.
Topics
- PHP security vulnerabilities
- Remote code execution
- CISA alerts
- Apache server security
- Software patch management
Recent posts
- PHP Releases…
- AFRICOM Conducts…
- U.S. Embassy…
- Kenya: U.S.…
- Haiti: U.S.…
Sponsors detected
No sponsored posts detected in the last 180 days of indexed posts.
Detected automatically from posts marked as sponsored. Detection can miss or misread placements.
See the full picture on Defcon Alerts Threat Monitor
Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.
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Compiled from public pages · refreshed Oct 22, 2026 · How NewsletterFIT collects and labels data