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CVE Record

CVE-2026-21935: Vulnerability in the Oracle Solaris product of Oracle Systems (component: Driver).

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Driver). The supported version that is affected is 11. Easily exploitable vulnerability allows high 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 creation, deletion or modification access to critical data or all Oracle Solaris accessible data as well as unauthorized access to critical data or complete access to all Oracle Solaris accessible data. CVSS 3.1 Base Score 5.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N).

MediumCVSS 5.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-21935 affects Oracle Solaris 11 in a driver component. An attacker already holding high privileges on a Solaris system could, with another user’s interaction, gain unauthorized read and modification access to critical data. This is not described as remotely exploitable and is not listed as known exploited in the provided sources.

Executive priority

Treat as a scheduled but important remediation item for Solaris 11 environments. Prioritize systems holding sensitive data or supporting critical business functions, especially where multiple administrators or interactive privileged sessions are common.

Technical view

Oracle describes a local, low-complexity Solaris 11 driver vulnerability requiring high privileges and user interaction. CVSS 3.1 is 5.8: AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N. Impact is confidentiality and integrity, with no availability impact stated. No CWE or technical root cause is provided in the source bundle.

Likely exposure

Exposure is limited to organizations running supported Oracle Solaris 11 systems. Risk is highest where highly privileged local accounts exist and users can be induced to interact with attacker-controlled content or workflows on those systems.

Exploitation context

The provided sources do not report active exploitation. Exploitation requires local access, high privileges, and human interaction by someone other than the attacker. This makes broad internet-scale exploitation unlikely based on available evidence, but insider or post-compromise misuse remains relevant.

Researcher notes

Public details are sparse. Oracle identifies the affected component only as Driver and does not provide a CWE in the supplied data. Avoid assuming exploit mechanics. Focus validation on Solaris 11 presence, Oracle CPU applicability, privilege model, and compensating controls around local administrative access.

Mitigation direction

  • Review Oracle’s January 2026 Critical Patch Update for Solaris 11 guidance.
  • Apply Oracle-provided Solaris 11 security updates when available for your environment.
  • Restrict and monitor high-privilege local access on Solaris systems.
  • Reduce unnecessary interactive use on privileged Solaris hosts.

Validation and detection

  • Inventory systems running Oracle Solaris 11.
  • Check whether the January 2026 Oracle CPU Solaris fixes are applied.
  • Review privileged local accounts on affected Solaris hosts.
  • Monitor for unusual privileged file access or data modification activity.
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-2026-21935 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
Medium
CVSS
5.8 (3.1)
Known Exploited
No
Published

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

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
5.8CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N0.65.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.8Medium
CVSS 3.1 vector shape for CVE-2026-21935Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 CorporationOracle Solaris11Listed
Weakness

CWE details

No CWE listed

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