CVE-2026-21927

Local unauthorized data access and modification

Published Jan 20, 2026 · Updated Jan 20, 2026

Unspecified driver vulnerability in Oracle Solaris 11 allows local users with high privileges to read and modify all accessible data. Oracle has not disclosed the affected driver, input, or incorrect operation that makes the access possible. Exploitation requires a logged-on high-privileged attacker and interaction by another person; no service interruption is reported.

CVSS severity5.8
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unspecified driver vulnerability in Oracle Solaris 11 allows local users with high privileges to read and modify all accessible data. Oracle has not disclosed the affected driver, input, or incorrect operation that makes the access possible. Exploitation requires a logged-on high-privileged attacker and interaction by another person; no service interruption is reported.

The record

CVE
CVE-2026-21927
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Oracle
Product
Oracle Solaris
Classifications
T1005, T1565.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle · Oracle Solarisversion=11

Published CVSS scores

5.8OracleCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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