Exploited CVEs / CVE-2019-11043

CVE-2019-11043

PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2022-04-15 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.

Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.

Senserva AI read on CVE-2019-11043 CISA required action Official fix for CVE-2019-11043 What the press says Admin questions #87 hottest CVE right now

Risk summary

CriticalCISA KEVRansomware

9.8

CVSS v3 base

100%

EPSS exploit probability

Critical

Severity

2022-03-25

Added to KEV

2022-04-15 (past due)

CISA due date

Actively exploited PHP FastCGI Process Manager (FPM) vulnerability, Critical severity, CVSS v3 9.8. Added to the CISA KEV catalog 2022-03-25.

Patch immediately

Exploited in the wild and used in ransomware campaigns.

No vendor fix is mapped yet. This page refreshes daily and will name the patch the day one is published.

Do this now: Move this ahead of everything else in the queue, then verify the fix actually landed on every exposed device.

Updated March 25, 2022. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Senserva AI Opinion for CVE-2019-11043

A trailing newline in a URL was enough to exploit PHP-FPM under certain nginx configurations, writing past allocated buffers to gain remote code execution. Exploitation is confirmed, ransomware use is documented, and EPSS holds at 99% because the vulnerable nginx and PHP-FPM pattern was a common tutorial configuration. Web hosts running PHP 7.1 through 7.3 with the affected setup are the target set for this Critical Severity flaw.

Do this: Update PHP-FPM on all web servers and review nginx configs for the vulnerable fastcgi_split_path_info pattern.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2019-11043

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I run IT security. Facts for CVE-2019-11043, an actively exploited vulnerability (source: https://senserva.com/cve/CVE-2019-11043.html, data from CISA KEV, FIRST.org EPSS, NVD, refreshed daily (early morning US Central)):
- CVE-2019-11043: PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability
- Affected: PHP FastCGI Process Manager (FPM)
- Severity: Critical, CVSS v3 9.8; EPSS 30-day exploitation probability 100%
- Added to CISA KEV: 2022-03-25; federal remediation due 2022-04-15
- Ransomware-linked: YES
- CISA required action: Apply updates per vendor instructions.
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) The fastest safe path to remediation. 4) How to check whether my environment is exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Full tracking and change history for CVE-2019-11043

Published: 2022-03-25
Last revised: 2022-03-25
Changes tracked: 1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Senserva Watchevery change we have recorded for this one

What changed, and when

Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.

2022-03-25 added to the CISA KEV catalog by CISA
2026-07-17 EPSS first scored at 99.5%
2026-07-24 EPSS 99.5% to 99.4%
2026-08-24 EPSS 99.4% to 99.5%
2026-08-26 EPSS 99.5% to 99.8%
2026-10-13 EPSS 99.8% to 99.8%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

CISA required action

Federal remediation due date: 2022-04-15 (past due).

Apply updates per vendor instructions.

Official fix for CVE-2019-11043

Check the vendor's security advisory channel for the patched FastCGI Process Manager (FPM) versions and workarounds.

CISA KEV entry

Common questions about CVE-2019-11043

Is CVE-2019-11043 actively exploited?

Yes. CVE-2019-11043 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-03-25, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.

What is the CISA deadline and required action for CVE-2019-11043?

CISA set the federal remediation due date at 2022-04-15, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.

What fixes CVE-2019-11043?

Check the vendor's security advisory for the patched FastCGI Process Manager (FPM) versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.

Can I ask my own AI about CVE-2019-11043?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2019-11043's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed daily (early morning US Central).

Scope and sources

More exploited PHP CVEs: CVE-2016-10033 CVE-2012-1823
Authoritative references: CVE record NVD detail CISA KEV catalog FIRST.org EPSS

Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.