# Attackers had four-day head start on PHP2Shell vulnerability

Hackers exploited the PHP2Shell vulnerability for four days before it became publicly known, Ars Technica reports. That head start gave attackers time to compromise vulnerable systems before defenders could begin patching. PHP’s widespread use across web servers makes the flaw broadly significant.

**Importance:** 4/5

## Sources

### Technology
- [Ars Technica](https://arstechnica.com/security/2026/10/hackers-got-a-four-day-head-start-on-epic-php2shell-vulnerability/) — Thu, 22 Oct 2026 15:25:02 +0000