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CVE-2021-2256

30
FAUCET Score

CVE-2021-2256 is a critical vulnerability in the Management Console component of Oracle Storage Cloud Software Appliance, affecting versions prior to 16.3.1.4.2. This easily exploitable flaw allows an unauthenticated attacker with network access via HTTP to fully compromise the appliance, leading to complete takeover and significant impact on confidentiality, integrity, and availability. With a CVSS score of 10.0, it poses a severe risk, though there is currently no known active exploitation, public exploit code, or Metasploit modules. Despite limited community discussion, the vulnerability has received some media coverage, highlighting the importance of applying the available patch.

Impacted Technologies

VendorProductVersion(s)CPE
< 16.3.1.4.2CPE matchmatch criteria
cpe:2.3:a:oracle:storage_cloud_software_appliance:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.67%
Probability of exploitation in next 30 days
EPSS Percentile
74.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0167 is in the 62nd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

oraclepatch availablevia nvd_reference
View patch

References

oracle.com / security-alerts/cpuapr2021.html
PatchVendor Advisory