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CVE Record

CVE-2021-2167: Vulnerability in the Oracle Solaris product of Oracle Systems (component: Common Desktop Environment).

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Common Desktop Environment). The supported version that is affected is 10. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks of this vulnerability can result in takeover of Oracle Solaris. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-2167 is a high-severity Oracle Solaris 10 issue in the Common Desktop Environment. A low-privileged user who can log on to the Solaris infrastructure could take over the affected system. The main business concern is legacy Solaris hosts where local accounts, shared access, or compromised credentials exist.

Executive priority

Treat this as a high-priority legacy platform risk. It is not described as remotely exploitable, but any attacker with Solaris login access could potentially take over the host, making access control and patch verification urgent.

Technical view

Oracle describes an easily exploitable local vulnerability in Solaris 10 Common Desktop Environment. The CVSS 3.1 vector is AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, scoring 7.8. Successful exploitation can compromise confidentiality, integrity, and availability and result in Oracle Solaris takeover.

Likely exposure

Exposure appears limited to Oracle Solaris 10 systems using the affected Common Desktop Environment component where an attacker has logon access. Internet exposure is not established by the sources; the access path is local authenticated access.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation evidence. The vulnerability still matters because a low-privileged logged-in attacker could escalate impact to full Solaris compromise.

Researcher notes

Public source detail is sparse: no CWE, root cause, exploit chain, or workaround is provided in the bundle. Validation should focus on affected Solaris 10 presence, CDE exposure, authenticated user access, and Oracle CPU patch applicability.

Mitigation direction

  • Review Oracle April 2021 Critical Patch Update guidance for CVE-2021-2167.
  • Apply the relevant Oracle Solaris 10 fixes or supported vendor remediation.
  • Restrict local and remote logon access to Solaris 10 systems.
  • Audit and remove unnecessary low-privileged accounts on affected hosts.
  • Prioritize legacy Solaris systems supporting sensitive workloads.

Validation and detection

  • Inventory Oracle Solaris 10 hosts in production and restricted networks.
  • Identify systems running or exposing Common Desktop Environment components.
  • Confirm Oracle April 2021 CPU remediation status for each host.
  • Review logs and account activity for unexpected low-privileged logons.
  • Document exceptions where vendor fixes cannot be applied promptly.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-2167 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2021-2167Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationSolaris Operating System10Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.