CVE Intelligence
CISA KEV High Memory corruption exploit reference

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

In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, 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 arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.

Published Apr 8, 2019 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, CVE Program (cve.org) e CISA ADP, NIST National Vulnerability Database, GitHub Security Advisories · CNA: apache

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Nov 3, 2021 Exploit-DB · 1
How the score was calculated
  • Confirmed exploitation (CISA KEV)+35
  • Public exploit/PoC (exploitdb)+8
  • EPSS 65% (30-day exploitation probability)+15
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Confirmed
CISA KEV, listed Nov 3, 2021
EPSS FIRST
65.01%
ahead of 99% of scored CVEs · Oct 14, 2026
Affects
Apache Software Foundation
Apache HTTP Server and 26 more
CVSS base
7.8
High · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Active
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — lists.apache.org (NIST National Vulnerability Database)
  • Documented patch — seclists.org (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: May 3, 2022 — passed 1626 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Apache Software Foundation Apache HTTP Server, Canonical Ubuntu Linux, Debian Debian Linux…).
  2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
  3. Apply the fixed version or the patch documented under Remediation.
  4. EPSS ahead of 99% of scored CVEs: prioritize it in the patch queue.
  5. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Apache Software Foundation Apache HTTP Server version 2.4.17 to 2.4.38 Vulnerable CVE Program (cve.org) e CISA ADP
Apache Software Foundation Apache HTTP Server ≥ 2.4.17 and ≤ 2.4.38 Vulnerable NIST National Vulnerability Database
Canonical Ubuntu Linux version 14.04version 16.04version 18.04version 18.10 Vulnerable NIST National Vulnerability Database
Debian Debian Linux version 9.0 Vulnerable NIST National Vulnerability Database
Fedoraproject Fedora version 29version 30version 28 Vulnerable NIST National Vulnerability Database
Netapp Oncommand Unified Manager versions not specified by the source Vulnerable NIST National Vulnerability Database
Opensuse Leap version 15.0version 42.3 Vulnerable NIST National Vulnerability Database
Oracle Communications Session Report Manager version 8.2.0version 8.1.1version 8.1.0version 8.0.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Session Route Manager version 8.1.0version 8.0.0version 8.1.1version 8.2.0 Vulnerable NIST National Vulnerability Database
Oracle Enterprise Manager Ops Center version 12.3.3version 12.4.0 Vulnerable NIST National Vulnerability Database
Oracle Http Server version 12.2.1.3.0 Vulnerable NIST National Vulnerability Database
Oracle Instantis Enterprisetrack version 17.3version 17.2version 17.1 Vulnerable NIST National Vulnerability Database
Oracle Retail Xstore Point Of Service version 7.1version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux version 8.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Eus version 8.6version 8.8version 8.4version 8.2version 8.1 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Arm 64 version 8.0_aarch64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Arm 64 Eus version 8.1_aarch64version 8.2_aarch64version 8.4_aarch64version 8.6_aarch64version 8.8_aarch64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Ibm Z Systems version 8.0_s390x Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Ibm Z Systems Eus version 8.4_s390xversion 8.1_s390xversion 8.2_s390xversion 8.6_s390xversion 8.8_s390x Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Little Endian version 8.0_ppc64le Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Little Endian Eus version 8.1_ppc64leversion 8.2_ppc64leversion 8.4_ppc64leversion 8.6_ppc64leversion 8.8_ppc64le Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server Aus version 8.2version 8.4version 8.6 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server Tus version 8.2version 8.4version 8.6version 8.8 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Update Services For Sap Solutions version 8.4version 8.0version 8.1version 8.8version 8.6 Vulnerable NIST National Vulnerability Database
Red Hat Jboss Core Services version 1.0 Vulnerable NIST National Vulnerability Database
Red Hat Openshift Container Platform version 3.11 Vulnerable NIST National Vulnerability Database
Red Hat Openshift Container Platform For Power version 3.11_ppc64le Vulnerable NIST National Vulnerability Database
Red Hat Software Collections version 1.0 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.8 CVSS 3.1 High 1.8 5.9 nvd@nist.gov via NIST National Vulnerability Database
7.8 CVSS 3.1 High 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
7.8 CVSS 3.1 High — — CISA-ADP via CVE Program (cve.org) e CISA ADP
7.8 CVSS 3.0 High — — GitHub, Inc. via GitHub Security Advisories
7.2 CVSS 2.0 High 3.9 10.0 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-416 · Use After Free

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed
Nov 3, 2021
Federal deadline
May 3, 2022
passed 1626 day(s) ago
Ransomware use
Unknown

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Exploit-DB

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 65.01%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
  • Hunt retroactively in logs from before Nov 3, 2021 (KEV listing): exploitation may have started earlier.
endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

  • 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • Affected products added · apache/http server, fedoraproject/fedora, canonical/ubuntu linux, debian/debian linux, opensuse/leap, netapp/oncommand u
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · Published → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record published
    Oct 13, 2026
  • Affected products added · apache/apache http server
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • CVSS changed · 7.8
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Source status changed · → Published
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Added to CISA KEV (detected)
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • Record created in this database
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • 2021
  • Added to CISA KEV catalog
    Nov 2, 2021 · CISA
  • 2019
  • CVE published
    Apr 8, 2019 · apache

Source activity

Repeated readings are counted rather than listed.

  • 3× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

81 on the record

Elsewhere on this site

Apache Software Foundation
every CVE for this vendor
2021-11
what else CISA listed that month
Memory corruption
same class
CWE-416
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests 9d
  • CVE-2026-104045 Sssd: sssd: denial of service via race condition in autofs responder 9d
  • CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation 9d
  • CVE-2026-104047 Sssd: sssd: information disclosure via query injection in entra id lookups 9d
  • CVE-2026-63718 Apache HTTP Server: mod_proxy_uwsgi Transfer-Encoding response smuggling 14d
  • CVE-2026-48005 Apache HTTP Server: mod_auth_digest reauthentication attack 14d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2019-0211 is "Apache HTTP Server Privilege Escalation Vulnerability", rated High. It affects Apache HTTP Server (Apache Software Foundation); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 7.8 describes technical severity. EPSS 65.01% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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