CVE-2021-2256Network attack vector

Unauthenticated takeover through undisclosed Management Console flaw

Published Apr 22, 2021 · Updated Sep 26, 2024

An undisclosed flaw in Oracle Storage Cloud Software Appliance before 16.3.1.4.2 allows remote attackers to take over the appliance via HTTP. Oracle identifies the Management Console as the affected component but has not published the faulty function, request field, or operation on untrusted input. Unauthenticated network access to the console is sufficient, and successful exploitation grants control of the appliance with potential effects on connected products.

CVSS severity10.0
Critical
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An undisclosed flaw in Oracle Storage Cloud Software Appliance before 16.3.1.4.2 allows remote attackers to take over the appliance via HTTP. Oracle identifies the Management Console as the affected component but has not published the faulty function, request field, or operation on untrusted input. Unauthenticated network access to the console is sufficient, and successful exploitation grants control of the appliance with potential effects on connected products.

The record

CVE
CVE-2021-2256
Published
Apr 22, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle Cloud Infrastructure
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=unspecified <16.3.1.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle Cloud Infrastructureversion=unspecified <16.3.1.4.2

Published CVSS scores

10.0Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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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