CVE-2021-2157Network attack vector

Unauthenticated access to all server-accessible data

Published Apr 22, 2021 · Updated Sep 26, 2024

Information disclosure in Oracle TopLink allows remote attackers to read all WebLogic Server-accessible data through HTTP. Oracle has not published the faulty TopLink Integration operation or how an HTTP request reaches it. No authentication or user interaction is required, and the reported consequence is confidentiality loss without data modification or service interruption.

CVSS severity7.5
High
EPSS probability1.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Oracle TopLink allows remote attackers to read all WebLogic Server-accessible data through HTTP. Oracle has not published the faulty TopLink Integration operation or how an HTTP request reaches it. No authentication or user interaction is required, and the reported consequence is confidentiality loss without data modification or service interruption.

The record

CVE
CVE-2021-2157
Published
Apr 22, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle TopLink
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=10.3.6.0.0
  2. Affected versionversion=12.1.3.0.0
  3. Affected versionversion=12.2.1.3.0
  4. Affected versionversion=12.2.1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle TopLinkversion=10.3.6.0.0; version=12.1.3.0.0; version=12.2.1.3.0; version=12.2.1.4.0

Published CVSS scores

7.5OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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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