CVE-2020-14756Public exploitNetwork attack vector

Unauthenticated code execution via unfiltered class loading

Published Jan 20, 2021 · Updated Sep 26, 2024

Deserialization in Oracle Utilities Application Framework allows remote attackers to execute code through HTTP without credentials. Coherence ExternalizableHelper loads attacker-selected classes directly during deserialization, bypassing the JEP 290 class filter. No credentials or user interaction are required; exploitation yields code execution in the application-server process.

CVSS severity9.8
Critical
EPSS probability74.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Oracle Utilities Application Framework allows remote attackers to execute code through HTTP without credentials. Coherence ExternalizableHelper loads attacker-selected classes directly during deserialization, bypassing the JEP 290 class filter. No credentials or user interaction are required; exploitation yields code execution in the application-server process.

The record

CVE
CVE-2020-14756
Published
Jan 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle Utilities Application Framework
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=4.2.0.2.0
  2. Affected versionversion=4.2.0.3.0
  3. Affected versionversion=4.3.0.1.0-4.3.0.6.0
  4. Affected versionversion=4.4.0.0.0
  5. Affected versionversion=4.4.0.2.0
  6. Affected versionversion=4.4.0.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle Utilities Application Frameworkversion=4.2.0.2.0; version=4.2.0.3.0; version=4.3.0.1.0-4.3.0.6.0; version=4.4.0.0.0; version=4.4.0.2.0; version=4.4.0.3.0

Published CVSS scores

9.8Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NISTAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

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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 exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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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