CVE-2022-21496Public exploitNetwork attack vector

Data modification via malformed LDAP authority parsing

Published Apr 19, 2022 · Updated Sep 24, 2024

Improper URI validation in Oracle Java SE JNDI allows remote attackers to alter Java-accessible data through crafted LDAP URLs. The com.sun.jndi.ldap.LdapURL parser accepts forbidden characters in an LDAP authority, so java.net.URI validation can approve a trusted host while JNDI resolves an attacker-controlled host. Exposure requires an application or sandboxed client to pass untrusted URLs into JNDI; the documented impact is limited to data modification.

CVSS severity5.3
Medium
EPSS probability2.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper URI validation in Oracle Java SE JNDI allows remote attackers to alter Java-accessible data through crafted LDAP URLs. The com.sun.jndi.ldap.LdapURL parser accepts forbidden characters in an LDAP authority, so java.net.URI validation can approve a trusted host while JNDI resolves an attacker-controlled host. Exposure requires an application or sandboxed client to pass untrusted URLs into JNDI; the documented impact is limited to data modification.

The record

CVE
CVE-2022-21496
Published
Apr 19, 2022
Updated
Sep 24, 2024
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
T1190, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Oracle GraalVM Enterprise Edition:20.3.5
  2. Affected versionversion=Oracle GraalVM Enterprise Edition:21.3.1
  3. Affected versionversion=Oracle GraalVM Enterprise Edition:22.0.0.2
  4. Affected versionversion=Oracle Java SE:11.0.14
  5. Affected versionversion=Oracle Java SE:17.0.2
  6. Affected versionversion=Oracle Java SE:18
  7. Affected versionversion=Oracle Java SE:7u331
  8. Affected versionversion=Oracle Java SE:8u321

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Oracle GraalVM Enterprise Edition:20.3.5; version=Oracle GraalVM Enterprise Edition:21.3.1; version=Oracle GraalVM Enterprise Edition:22.0.0.2; version=Oracle Java SE:11.0.14; version=Oracle Java SE:17.0.2; version=Oracle Java SE:18; version=Oracle Java SE:7u331; version=Oracle Java SE:8u321

Published CVSS scores

5.0NISTAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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