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CVE-2019-11043

9.8, critical Known exploited Used in ransomware

PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
100% higher than 99.9% of scored CVEs
Exploitation
Confirmed in the wild
Published
28 Oct 20196 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 25 Mar 2022 and links it to ransomware activity. US federal agencies had to remediate by 15 Apr 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

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.

Details

Vendor
PHP
Product
PHP
Weakness
CWE-120 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
security@php.net

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

References 28

Exploit code 4

Advisories 23

15 more

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other PHP CVEs

Every PHP CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2016-10033 PHPMailer Command Injection Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2012-1823 PHP-CGI Query String Parameter Vulnerability KEV EPSS 100% 9.8, critical

Beyond this page

Is CVE-2019-11043 in your network?

This page tells you how dangerous CVE-2019-11043 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2019-11043 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.