Exploited vulnerability · CISA KEV

Is CVE-2024-4577 exploited? Yes: in CISA KEV since 12 Jun 2024

Gociux · PHP Group PHP · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-4577, PHP-CGI OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 12 Jun 2024, 3 days after it was published. It is known to be used in ransomware campaigns. It affects PHP Group PHP. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What it is

PHP, specifically Windows-based PHP used in CGI mode, contains an OS command injection vulnerability that allows for arbitrary code execution. This vulnerability is a patch bypass for CVE-2012-1823.

What to do

1. Check whether you run it. Look for PHP in your asset inventory, including appliances and cloud images. Stack check lists every exploited PHP Group CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 9 Jun 2024.
4. Get told next time. Email alerts when CISA adds a CVE for PHP Group.

Other exploited CVEs in PHP

• CVE-2026-109618: PHP Memory Corruption Vulnerability (26 Oct 2026)
• CVE-2026-109619: PHP Stale Internal Request-State Vulnerability (26 Oct 2026)

References

• nvd.nist.gov/vuln/detail/CVE-2024-4577

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in June 2024 · PHP Group scorecard · act-now radar.