PHP-CGI Argument Injection (CVE-2024-4577) for 2026-07-21

Jul 21, 2026 Exploitation

Last Updated: 00:00 UTC

CVE-2024-4577 lets an attacker pass command-line options to PHP-CGI on Windows by using a soft hyphen (%AD) that Windows best-fit mapping turns into a dash. Requests set allow_url_include and auto_prepend_file=php://input so the POST body runs as PHP. The RedTail cryptomining botnet (User-Agent libredtail-http) sprays this against every host it finds.

CVE References

CVE-2024-4577

MITRE ATT&CK

Tactic: Initial Access (TA0001)
Technique: T1190 — Exploit Public-Facing Application

Observed URIs

Attackers by Country

China: 2United States: 2United Kingdom: 1The Netherlands: 1
China233.3%
United States233.3%
United Kingdom116.7%
The Netherlands116.7%

IP Address : ASN : City/Provider

  • 115.191.32.57 : AS137718 Beijing Volcano Engine Technology Co., Ltd. : China

  • 117.175.140.121 : AS9808 China Mobile Communications Group Co., Ltd. : China

  • 192.255.141.70 : AS36352 HostPapa : United States

  • 47.253.5.130 : AS45102 Alibaba (US) Technology Co., Ltd. : United States

  • 83.97.78.224 : AS215540 Global Connectivity Solutions Llp : United Kingdom

  • 84.105.229.48 : AS33915 Vodafone Libertel B.V. : Hoorn

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