CVE-2021-2066Network attack vector

Unauthenticated data modification via undisclosed filter flaw

Published Jan 20, 2021 · Updated Sep 26, 2024

Undisclosed flaw in Outside In Filters in Oracle Outside In Technology 8.5.4 and 8.5.5 allows remote attackers to alter data. Oracle has not published the defective parser path or the operation performed on untrusted documents. Exposure requires a consuming application to pass network-supplied data into the SDK; successful exploitation reads some accessible data, changes critical data, and partially interrupts service.

CVSS severity8.6
High
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Undisclosed flaw in Outside In Filters in Oracle Outside In Technology 8.5.4 and 8.5.5 allows remote attackers to alter data. Oracle has not published the defective parser path or the operation performed on untrusted documents. Exposure requires a consuming application to pass network-supplied data into the SDK; successful exploitation reads some accessible data, changes critical data, and partially interrupts service.

The record

CVE
CVE-2021-2066
Published
Jan 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle Outside In Technology
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 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=8.5.4
  2. Affected versionversion=8.5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle Outside In Technologyversion=8.5.4; version=8.5.5

Published CVSS scores

8.6OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

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

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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