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Varaxon Technologies

Known exploited vulnerability · CISA KEV

CVE-2019-0211: Apache HTTP Server Privilege Escalation Vulnerability

Apache HTTP Server, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute code with the privileges of the parent process (usually root) by manipulating the scoreboard.

CVE-2019-0211

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03: attackers are using it right now.

CISA KEV
Listed
Added 2021-11-03 · federal fix-by 2022-05-03
EPSS (30 days)
65%
Higher than 99.3% of CVEs · 2026-11-01
CVSS
No score

What CISA says

Apache HTTP Server Privilege Escalation Vulnerability

Apply updates per vendor instructions.

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How to check if you are exposed to CVE-2019-0211

  1. Find every Apache HTTP Server system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
  2. Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
  3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2019-0211.

US federal agencies had to fix this by 2022-05-03. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Timeline

  1. · Added to CISA's Known Exploited Vulnerabilities catalog
  2. · Fix-by date for US federal agencies, passed 1,643 days ago

Weakness type

More exploited Apache vulnerabilities

CISA lists 41 exploited Apache vulnerabilities. The closest matches:

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

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