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CVE Record

CVE-2026-21927: 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-2026-21927 affects Oracle Solaris 11 in a driver component. An already highly privileged logged-in user could, with another person’s interaction, gain unauthorized read or modify access to critical Solaris-accessible 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 security update priority for Solaris 11, especially on systems containing sensitive data. It is not an emergency based on available evidence, but the potential data access and modification impact justifies timely remediation.

Technical view

Oracle rates this Solaris 11 driver vulnerability CVSS 3.1 5.8: AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N. Impact is high confidentiality and integrity loss, with no availability impact. The attacker needs local access and high privileges, and exploitation requires user interaction by someone other than the attacker.

Likely exposure

Exposure is limited to environments running supported Oracle Solaris 11. Risk is highest on shared administrative hosts, systems with many privileged users, or Solaris servers handling sensitive data.

Exploitation context

The provided sources do not indicate active exploitation, public exploit availability, or KEV listing. The attack is local, requires high privileges, and requires human interaction, reducing broad internet-scale risk but preserving insider or post-compromise relevance.

Researcher notes

Public detail is limited. No CWE is provided. The affected component is listed only as Driver. The vulnerability requires local access, high privileges, and user interaction, so validation should focus on Solaris 11 patch state and privileged access exposure rather than remote scanning.

Mitigation direction

  • Review Oracle’s January 2026 Critical Patch Update guidance for Solaris 11.
  • Apply applicable Oracle Solaris 11 security updates after normal testing.
  • Restrict and audit high-privilege Solaris logons.
  • Limit interactive access on Solaris systems handling critical data.

Validation and detection

  • Inventory systems running Oracle Solaris 11.
  • Confirm whether Oracle’s January 2026 Solaris guidance has been applied.
  • Review privileged user access to affected Solaris hosts.
  • Check change and access logs for unusual privileged data access.
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-2026-21927 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-2026-21927Attack 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.