CVE-2019-11043: in the CISA KEV catalogue
PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability. CISA added CVE-2019-11043 to the Known Exploited Vulnerabilities catalogue on 2022-03-25 with a default due date of 2022-04-15. Known ransomware campaign use: Known. Forensic triage flag: No.
In some versions of PHP in certain configurations of FPM setup, it is possible to cause FPM module to write past allocated buffers allowing the possibility of remote code execution. (CISA description)
- Vendor / product
- PHP FastCGI Process Manager (FPM)
- CWE
- CWE-120
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 100%, percentile 99 (scored 2026-11-03)
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-2019-11043 in the CISA KEV catalogue?
Yes. CISA added CVE-2019-11043 (PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-03-25. CISA's default due date for it is 2022-04-15.
Is CVE-2019-11043 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2019-11043.
What should I do about CVE-2019-11043?
CISA's required action: Apply updates per vendor instructions.
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-2019-11043