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CVE Record

CVE-2021-35549: Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility).

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility). The supported version that is affected is 11. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Solaris accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Solaris. CVSS 3.1 Base Score 3.9 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L).

LowCVSS 3.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a low-severity Oracle Solaris 11 issue in a utility component. An attacker must already have low-privileged local access and must get another user to interact with something. Successful exploitation could alter some Solaris-accessible data or cause a partial service disruption, but the source reports no confidentiality impact.

Executive priority

Treat this as routine patch governance, not emergency response, unless Solaris 11 hosts are shared by untrusted users or support critical operations. Prioritize during the next controlled Solaris maintenance window.

Technical view

CVE-2021-35549 affects Oracle Solaris 11, component Utility. CVSS 3.1 score is 3.9 with local attack vector, low complexity, low privileges, required user interaction, unchanged scope, no confidentiality impact, and low integrity and availability impacts.

Likely exposure

Exposure is mainly Solaris 11 systems that allow local logons for non-administrators, contractors, shared users, or semi-trusted workloads. Systems without broad interactive access are less exposed based on the local, low-privilege, user-interaction requirements.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires local authenticated access and human interaction by someone other than the attacker, which limits remote drive-by risk but still matters on shared Solaris environments.

Researcher notes

Evidence is limited to the CVE record and Oracle advisory reference. No CWE is supplied. Focus validation on Solaris 11 presence, local account exposure, user-interaction paths, and whether Oracle’s October 2021 CPU remediation was applied.

Mitigation direction

  • Review Oracle October 2021 CPU guidance for Solaris 11 remediation.
  • Apply the relevant Oracle-recommended Solaris 11 updates where applicable.
  • Restrict local logon access to trusted users only.
  • Reduce shared accounts and unnecessary interactive shell access.
  • Train operators not to interact with untrusted local content or requests.

Validation and detection

  • Inventory hosts running Oracle Solaris 11.
  • Check whether Oracle October 2021 CPU fixes are applied.
  • Identify systems with low-privileged local user access.
  • Review whether affected hosts support shared or semi-trusted shell access.
  • Confirm monitoring covers unauthorized data changes and partial service disruption.
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-2021-35549 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
Low
CVSS
3.9 (3.1)
Known Exploited
No
Published

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

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
3.9CVSS 3.1LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L1.32.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

3.9Low
CVSS 3.1 vector shape for CVE-2021-35549Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 System11Listed
Weakness

CWE details

No CWE listed

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