CVE-2021-44832 | Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration

Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

Published: 2021-12-28 Last update: 2026-05-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44832 is rated Moderate Risk (63.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 53.65%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.20% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-44832

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-20 50.44% 53.65% +3.20%
2 2026-05-01 53.65% 50.44% -3.20%
3 2026-04-14 — 53.65% —

Full EPSS history (84 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44832

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.6 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.7 5.9 [email protected]
6.6 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.7 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
8.5 2.0 HIGH
AV:N/AC:M/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 6.8 10.0 [email protected]

Weakness enumeration for CVE-2021-44832

GitHub Security Advisory for CVE-2021-44832

GHSA-8489-44mv-ggj8 · Severity: medium · Ecosystem: maven — Improper Input Validation and Injection in Apache Log4j2

OS Trackers for CVE-2021-44832

vendor priority summary link
debian not yet assigned CVE-2021-44832 not yet assigned priority: Debian including 1 source packages (apache-log4j2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-44832
redhat medium — https://access.redhat.com/security/cve/CVE-2021-44832
suse medium CVE-2021-44832 severity moderate: SUSE including 25 source package names (5.0.0-beta1.2.122:log4j-2.17.0-4.16.1, 5.0.0-beta1.2.122:log4j-jcl-2.17.0-4.16.1, …), 134 product×package rows across 66 product lines (Container suse/manager/5.0/x86_64/server, Container suse/manager/5.0/x86_64/server-attestation, … (66 product lines)): Fixed 73, Known Not Affected 61. https://www.suse.com/security/cve/CVE-2021-44832/
ubuntu medium CVE-2021-44832 medium priority: Ubuntu including 1 source packages (apache-log4j2), 15 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 4, released 4, needs-triage 3, not-affected 2, DNE 1, needed 1. https://ubuntu.com/security/CVE-2021-44832

Affected software / configurations for CVE-2021-44832

Vendor Product Version Raw CPE
apache log4j >= 2.0.1, < 2.3.2 cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*
apache log4j >= 2.4, < 2.12.4 cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*
apache log4j >= 2.13.0, < 2.17.1 cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*
apache log4j 2.0 cpe:2.3:a:apache:log4j:2.0:-:*:*:*:*:*:*
apache log4j 2.0 cpe:2.3:a:apache:log4j:2.0:beta7:*:*:*:*:*:*
apache log4j 2.0 cpe:2.3:a:apache:log4j:2.0:beta8:*:*:*:*:*:*
apache log4j 2.0 cpe:2.3:a:apache:log4j:2.0:beta9:*:*:*:*:*:*
apache log4j 2.0 cpe:2.3:a:apache:log4j:2.0:rc1:*:*:*:*:*:*
apache log4j 2.0 cpe:2.3:a:apache:log4j:2.0:rc2:*:*:*:*:*:*
oracle communications_diameter_signaling_router >= 8.0.0.0, <= 8.5.1.0 cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*
oracle communications_interactive_session_recorder 6.3 cpe:2.3:a:oracle:communications_interactive_session_recorder:6.3:*:*:*:*:*:*:*
oracle communications_interactive_session_recorder 6.4 cpe:2.3:a:oracle:communications_interactive_session_recorder:6.4:*:*:*:*:*:*:*
oracle primavera_gateway >= 17.12.0, <= 17.12.11 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway >= 18.8.0, <= 18.8.13 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway >= 19.12.0, <= 19.12.12 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway >= 20.12.0, <= 20.12.7 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway 21.12.0 cpe:2.3:a:oracle:primavera_gateway:21.12.0:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 19.12.0, <= 19.12.18.0 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 20.12.0.0, <= 20.12.12.0 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management 21.12.0.0 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:21.12.0.0:*:*:*:*:*:*:*
oracle primavera_unifier 18.8 cpe:2.3:a:oracle:primavera_unifier:18.8:*:*:*:*:*:*:*
oracle primavera_unifier 19.12 cpe:2.3:a:oracle:primavera_unifier:19.12:*:*:*:*:*:*:*
oracle primavera_unifier 20.12 cpe:2.3:a:oracle:primavera_unifier:20.12:*:*:*:*:*:*:*
oracle primavera_unifier 21.12 cpe:2.3:a:oracle:primavera_unifier:21.12:*:*:*:*:*:*:*
oracle retail_assortment_planning 16.0.3 cpe:2.3:a:oracle:retail_assortment_planning:16.0.3:*:*:*:*:*:*:*
oracle retail_fiscal_management 14.2 cpe:2.3:a:oracle:retail_fiscal_management:14.2:*:*:*:*:*:*:*
oracle siebel_ui_framework 21.12 cpe:2.3:a:oracle:siebel_ui_framework:21.12:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.3.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.4.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*
oracle weblogic_server 14.1.1.0.0 cpe:2.3:a:oracle:weblogic_server:14.1.1.0.0:*:*:*:*:*:*:*
cisco cloudcenter 4.10.0.16 cpe:2.3:a:cisco:cloudcenter:4.10.0.16:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
fedoraproject fedora 35 cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
oracle communications_brm_-_elastic_charging_engine < 12.0.0.4.6 cpe:2.3:a:oracle:communications_brm_-_elastic_charging_engine:*:*:*:*:*:*:*:*
oracle communications_brm_-_elastic_charging_engine 12.0.0.5.0 cpe:2.3:a:oracle:communications_brm_-_elastic_charging_engine:12.0.0.5.0:*:*:*:*:*:*:*
oracle communications_diameter_signaling_router >= 8.3.0.0, <= 8.5.1.0 cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*
oracle communications_offline_mediation_controller < 12.0.0.4.4 cpe:2.3:a:oracle:communications_offline_mediation_controller:*:*:*:*:*:*:*:*
oracle communications_offline_mediation_controller 12.0.0.5.0 cpe:2.3:a:oracle:communications_offline_mediation_controller:12.0.0.5.0:*:*:*:*:*:*:*
oracle flexcube_private_banking 12.1.0 cpe:2.3:a:oracle:flexcube_private_banking:12.1.0:*:*:*:*:*:*:*
oracle health_sciences_data_management_workbench 2.5.2.1 cpe:2.3:a:oracle:health_sciences_data_management_workbench:2.5.2.1:*:*:*:*:*:*:*
oracle health_sciences_data_management_workbench 3.0.0.0 cpe:2.3:a:oracle:health_sciences_data_management_workbench:3.0.0.0:*:*:*:*:*:*:*
oracle health_sciences_data_management_workbench 3.1.0.3 cpe:2.3:a:oracle:health_sciences_data_management_workbench:3.1.0.3:*:*:*:*:*:*:*
oracle policy_automation >= 12.2.0, <= 12.2.24 cpe:2.3:a:oracle:policy_automation:*:*:*:*:*:*:*:*
oracle policy_automation_for_mobile_devices >= 12.2.0, <= 12.2.24 cpe:2.3:a:oracle:policy_automation_for_mobile_devices:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 19.12.0.0, <= 19.12.18.0 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle product_lifecycle_analytics 3.6.1 cpe:2.3:a:oracle:product_lifecycle_analytics:3.6.1:*:*:*:*:*:*:*
oracle retail_order_broker 18.0 cpe:2.3:a:oracle:retail_order_broker:18.0:*:*:*:*:*:*:*
oracle retail_order_broker 19.1 cpe:2.3:a:oracle:retail_order_broker:19.1:*:*:*:*:*:*:*
oracle retail_xstore_point_of_service 17.0.4 cpe:2.3:a:oracle:retail_xstore_point_of_service:17.0.4:*:*:*:*:*:*:*
oracle retail_xstore_point_of_service 18.0.3 cpe:2.3:a:oracle:retail_xstore_point_of_service:18.0.3:*:*:*:*:*:*:*
oracle retail_xstore_point_of_service 19.0.2 cpe:2.3:a:oracle:retail_xstore_point_of_service:19.0.2:*:*:*:*:*:*:*
oracle retail_xstore_point_of_service 20.0.1 cpe:2.3:a:oracle:retail_xstore_point_of_service:20.0.1:*:*:*:*:*:*:*
oracle retail_xstore_point_of_service 21.0.1 cpe:2.3:a:oracle:retail_xstore_point_of_service:21.0.1:*:*:*:*:*:*:*
oracle siebel_ui_framework <= 21.12 cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:*

References for CVE-2021-44832

URL Tags
http://www.openwall.com/lists/oss-security/2021/12/28/1 Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-784507.pdf Third Party Advisory
https://issues.apache.org/jira/browse/LOG4J2-3293 Issue Tracking Patch Vendor Advisory
https://lists.apache.org/thread/s1o5vlo78ypqxnzn6p8zf6t9shtq5143 Mailing List Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00036.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EVV25FXL4FU5X6X5BSL7RLQ7T6F65MRA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57MPJUW3MA6QGWZRTMCHHMMPQNVKGFC/
https://security.netapp.com/advisory/ntap-20220104-0001/ Third Party Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html Patch Third Party Advisory
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