CVE-2022-21248Network attack vector

Data modification via unchecked serialized superclasses

Published Jan 19, 2022 · Updated Sep 24, 2024

Serialization filtering in Oracle Java SE 7u321, 8u311, 11.0.13, and 17.0.1 allows remote attackers to modify accessible data. ObjectInputStream fails to apply the configured deserialization filter to locally available superclasses omitted from a crafted stream, allowing restricted classes through. Exploitation requires untrusted code in a sandboxed Java client or an application, such as a web service, that passes attacker-controlled data to Serialization APIs.

CVSS severity3.7
Low
EPSS probability3.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Serialization filtering in Oracle Java SE 7u321, 8u311, 11.0.13, and 17.0.1 allows remote attackers to modify accessible data. ObjectInputStream fails to apply the configured deserialization filter to locally available superclasses omitted from a crafted stream, allowing restricted classes through. Exploitation requires untrusted code in a sandboxed Java client or an application, such as a web service, that passes attacker-controlled data to Serialization APIs.

The record

CVE
CVE-2022-21248
Published
Jan 19, 2022
Updated
Sep 24, 2024
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 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

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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=Oracle GraalVM Enterprise Edition:20.3.4
  2. Affected versionversion=Oracle GraalVM Enterprise Edition:21.3.0
  3. Affected versionversion=Oracle Java SE:11.0.13
  4. Affected versionversion=Oracle Java SE:17.0.1
  5. Affected versionversion=Oracle Java SE:7u321
  6. Affected versionversion=Oracle Java SE:8u311

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:20.3.4; version=Oracle GraalVM Enterprise Edition:21.3.0; version=Oracle Java SE:11.0.13; version=Oracle Java SE:17.0.1; version=Oracle Java SE:7u321; version=Oracle Java SE:8u311

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
3.7OracleCVSS:3.1/AV:N/AC:H/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 exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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