CVE-2019-11043 HIGH

CVE-2019-11043: Underflow in PHP-FPM can lead to RCE

Vendor Php
Product PHP
Weakness CWE-120
KEV Status Known Exploited
Ransomware Used in campaigns
Published October 28, 2019
Last update October 21, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.

CISA mandated remediation

02CISA Required Action

Apply updates per vendor instructions.

Key dates

03Disclosure timeline

October 28, 2019 CVE published
October 21, 2025 Record updated

Related vulnerabilities

05Related CVE

CVE-2021-33035 Buffer overflow from a crafted DBF file CVE-2024-10964 emqx neuron plugin_handle.c handle_add_plugin buffer overflow CVE-2020-37130 Nsauditor 3.2.0.0 - 'Name' Denial of Service CVE-2025-6953 TOTOLINK A3002RU HTTP POST Request formParentControl buffer overflow CVE-2025-1253 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Variables and Tags.