CVE Intel / CVE-2024-4577
CVE-2024-4577
php · fedoraproject, microsoft, php
What it is
In PHP versions 8.1.* before 8.1.29, 8.2.* before 8.2.20, 8.3.* before 8.3.8, when using Apache and PHP-CGI on Windows, if the system is set up to use certain code pages, Windows may use "Best-Fit" behavior to replace characters in command line given to Win32 API functions. PHP CGI module may misinterpret those characters as PHP options, which may allow a malicious user to pass options to PHP binary being run, and thus reveal the source code of scripts, run arbitrary PHP code on the server, etc.
Live exploitation on the huntback network (30 days)
2
attempts captured
2
distinct source IPs
2026-09-23
last seen
huntback carries a network signature for this CVE. Exploitation attempts are detected on the decoy fleet in real time.
How huntback helps
Deploy a decoy that emulates php and you will see every attempt at this CVE the moment it lands, with the full payload, the attacker's infrastructure, and any stage-2 loader. Then huntback can scan the attacker back.
CVSSn/a Critical
EPSS1.00 (99% pct)
In CISA KEVyes
Publishedn/a
Network detectableyes, signatured