CVE-2024-4577: in the CISA KEV catalogue
PHP-CGI OS Command Injection Vulnerability. CISA added CVE-2024-4577 to the Known Exploited Vulnerabilities catalogue on 2024-06-12 with a default due date of 2024-07-03. Known ransomware campaign use: Known. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- PHP Group PHP
- CWE
- CWE-78
- CISA required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS
- 100%, percentile 99 (scored 2026-11-04)
EPSS puts nearly every time in 100 odds (100%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2024-4577 in the CISA KEV catalogue?
Yes. CISA added CVE-2024-4577 (PHP-CGI OS Command Injection Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2024-06-12. CISA's default due date for it is 2024-07-03.
Is CVE-2024-4577 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2024-4577.
What should I do about CVE-2024-4577?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2024-4577