What is the CVSS score of CVE-2019-17571?

CVE-2019-17571 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 33.8%.

Is there a patch available for CVE-2019-17571?

Yes, a patch is available for CVE-2019-17571. Update the affected software to the latest version immediately.

Log4J CVE-2019-17571

CRITICAL

Deserialization of Untrusted Data (CWE-502)

2019-12-20 security@apache.org

GHSA-2qrg-x229-3v8q

RCE Apache Deserialization Debian Oracle Canonical Debian Linux Leap Oncommand Workflow Automation Ubuntu Linux Weblogic Server Application Testing Suite Oncommand System Manager Mysql Enterprise Monitor Opensuse Retail Service Backbone Primavera Gateway Log4J Communications Network Integrity Endeca Information Discovery Studio Financial Services Lending And Leasing Rapid Planning Retail Extract Transform And Load Bookkeeper Netapp

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-502 OWASP Top 10:2025 A08:2025 - Software or Data Integrity Failures ASVS 5.0 V1 - Encoding and Sanitization Safe deserialization, type allowlists MITRE ATT&CK 2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 33.80%.
Exploit ScenarioDerived	A remote attacker could execute arbitrary code through malicious serialized objects by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 33.8% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 33.8%.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Avoid deserializing untrusted data. Use safe serialization formats (JSON). Implement integrity checks and type allowlists.

Affected Packages

maven log4j:log4j no fix

maven org.zenframework.z8.dependencies.commons:log4j-1.2.17 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Deserialization of Untrusted Data (CWE-502), which allows attackers to execute arbitrary code through malicious serialized objects. Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17. Affected products include: Apache Log4J, Debian Debian Linux, Canonical Ubuntu Linux, Opensuse Leap, Netapp Oncommand System Manager. Version information: up to 1.2.

Know when Log4J gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17.

Threat Intelligence Overview

EPSS Score

33.8%

Top 3% exploitable

Threat Intel

1 source

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS GHSA

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 33.8%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +34

CVSS: +49

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Insecure Deserialization CRITICAL

Insecure deserialization occurs when an application converts serialized data (a stream of bytes representing an object's state) back into a living object without proper validation.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)CVE.org

cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

cpe:2.3:a:netapp:oncommand_system_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*

cpe:2.3:a:oracle:application_testing_suite:13.3.0.1:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_network_integrity:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:endeca_information_discovery_studio:3.2.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:financial_services_lending_and_leasing:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:financial_services_lending_and_leasing:12.5.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:rapid_planning:12.1:*:*:*:*:*:*:*

cpe:2.3:a:oracle:rapid_planning:12.2:*:*:*:*:*:*:*

cpe:2.3:a:oracle:retail_extract_transform_and_load:19.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:retail_service_backbone:14.1:*:*:*:*:*:*:*

+ 8 more

More in Log4J

View all

CVE-2021-44228 CRITICAL Act Now POC

10.0 Dec 10

Apache Log4j2 contains a critical JNDI injection vulnerability known as 'Log4Shell' that allows unauthenticated remote c

CVE-2017-5645 CRITICAL Act Now POC

9.8 Apr 17

In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events

CVE-2021-45105 MEDIUM This Month

5.9 Dec 18

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursio

CVE-2021-4104 HIGH Act Now

7.5 Dec 14

JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Lo

CVE-2021-44832 MEDIUM This Month

6.6 Dec 28

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 r

CVE-2022-23305 CRITICAL Act Now

9.8 Jan 18

By design, the JDBCAppender in Log4j 1.2.x accepts an SQL statement as a configuration parameter where the values to be

CVE-2022-23307 HIGH This Week

8.8 Jan 18

CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Rated high severity (CVSS 8.8), th

CVE-2022-23302 HIGH This Week

8.8 Jan 18

JMSSink in all versions of Log4j 1.x is vulnerable to deserialization of untrusted data when the attacker has write acce

CVE-2023-26464 HIGH This Week

7.5 Mar 10

** UNSUPPORTED WHEN ASSIGNED ** When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7

CVE-2020-9488 LOW Monitor

3.7 Apr 27

Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. Rated low severity (CVSS 3.7), this

Same weakness CWE-502 – Deserialization of Untrusted Data

View all

CVE-2021-35464 CRITICAL POC

9.8

CVE-2020-10189 CRITICAL POC

9.8

CVE-2019-18935 CRITICAL POC

9.8

CVE-2015-7450 CRITICAL POC

9.8

CVE-2025-53770 CRITICAL POC

9.8

CVE-2020-7961 CRITICAL POC

9.8

CVE-2021-42237 CRITICAL POC

9.8

CVE-2025-24016 CRITICAL POC

9.9

Same technique RCE

View all

CVE-2017-7269 CRITICAL POC

9.8

CVE-2022-47966 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2023-3519 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2016-4117 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

References

Advisories & patches

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back