What is CVE-2026-21928?

CVE-2026-21928 is a medium-severity vulnerability in Oracle Solaris, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-01-20.

How severe is CVE-2026-21928?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Oracle Solaris

CVE-2026-21928

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Kernel). The supported version that is affected is 11. Easily exploitable vulnerability allows unauthenticated attacker with network access via TCP to compromise Oracle Solaris. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Solaris accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Vulnerability class: Information Disclosure

EPSS: 0.003 (20.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Oracle Solaris — versions 11
Oracle Corporation Solaris — versions 11

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

secalert_us@oracle.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-21928?: CVE-2026-21928 is a medium-severity vulnerability in Oracle Solaris, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-01-20.
How severe is CVE-2026-21928?: Medium severity. CVSS v3 base score is 5.3 out of 10.