CVE-2022-23302Network attack vector

Remote code execution via attacker-controlled JNDI lookup

Published Jan 18, 2022 · Updated May 27, 2026

Remote code execution in Apache Log4j 1.x allows remote authenticated users to execute code through a JMSSink JNDI lookup. JMSSink passes TopicConnectionFactoryBindingName to Context.lookup, allowing an attacker-controlled LDAP directory to return an unsafe object that JNDI instantiates. Exposure requires the non-default JMSSink component plus writable Log4j configuration or a referenced LDAP service accessible to the attacker.

CVSS severity8.8
High
EPSS probability63.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Apache Log4j 1.x allows remote authenticated users to execute code through a JMSSink JNDI lookup. JMSSink passes TopicConnectionFactoryBindingName to Context.lookup, allowing an attacker-controlled LDAP directory to return an unsafe object that JNDI instantiates. Exposure requires the non-default JMSSink component plus writable Log4j configuration or a referenced LDAP service accessible to the attacker.

The record

CVE
CVE-2022-23302
Published
Jan 18, 2022
Updated
May 27, 2026
Vendor
The Apache Software Foundation
Product
Apache Log4j
Classifications
CWE-502
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.1 <unspecified
  2. Affected versionversion=unspecified <2.0-alpha1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Log4jversion=1.0.1 <unspecified; version=unspecified <2.0-alpha1

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.0NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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