PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability
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.
- Vendor
- PHP
- Product
- FastCGI Process Manager (FPM)
- CVSS
- 8.7
- EPSS (exploit probability)
- 99.7%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2019-11043 being exploited?
Yes. CISA added CVE-2019-11043 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild. CISA marks it as known to be used in ransomware campaigns.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 99.7% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other PHP CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2016-10033 PHPMailer Command Injection Vulnerability | [ CRITICAL ] | 9.8 | 99.7% | |
| CVE-2012-1823 PHP-CGI Query String Parameter Vulnerability | [ CRITICAL ] | 9.8 | 100.0% |