Critical 9.8Known exploited (CISA KEV)Published Jun 9, 2024

CVE-2024-4577Argument Injection in PHP-CGI

Updated under an hour ago (Oct 26, 2026, 4:30 PM ET)

Does this affect you?

It affects PHP Group PHP and 2 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Jun 12, 2024; federal agencies had to remediate by Jul 3, 2024, and it is known to be used in ransomware. Treat that date as your deadline.

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Every CVE for PHP Group PHP

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Added to CISA KEV Jun 12, 2024; federal remediation due Jul 3, 2024; known ransomware useApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 99.99% (percentile 100)
Assigned by: php
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

PHP Group PHP php_group:php (from the name)	from 8.1.* before 8.1.29; from 8.2.* before 8.2.20; from 8.3.* before 8.3.8	CNA record
php_group php php_group:php	from 8.1.0 before 8.1.29	CISA ADP
php php php:php	from 8.1.0 before 8.1.29; from 8.2.0 before 8.2.20; from 8.3.0 before 8.3.8	NVD
fedoraproject fedora fedoraproject:fedora	39; 40	NVD

References

References

https://github.com/php/php-src/security/advisories/GHSA-3qgc-jrrr-25jv	exploit, third-party-advisory
https://blog.orange.tw/2024/06/cve-2024-4577-yet-another-php-rce.html	third-party-advisory
https://devco.re/blog/2024/06/06/security-alert-cve-2024-4577-php-cgi-argument-injection-vulnerability-en/	exploit, third-party-advisory
https://arstechnica.com/security/2024/06/php-vulnerability-allows-attackers-to-run-malicious-code-on-windows-servers/	exploit, press/media-coverage, third-party-advisory
https://www.imperva.com/blog/imperva-protects-against-critical-php-vulnerability-cve-2024-4577/	third-party-advisory
https://github.com/11whoami99/CVE-2024-4577	exploit
https://github.com/xcanwin/CVE-2024-4577-PHP-RCE	exploit, third-party-advisory
https://github.com/rapid7/metasploit-framework/pull/19247	exploit, issue-tracking, patch
https://labs.watchtowr.com/no-way-php-strikes-again-cve-2024-4577/	exploit, third-party-advisory
https://github.com/watchtowrlabs/CVE-2024-4577	exploit, third-party-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.