How severe is CVE-2026-21928?

CVE-2026-21928 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-21928 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21928?

CVE-2026-21928 affects Oracle Solaris. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21928?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-21928 have an EU (EUVD) identifier?

Yes. CVE-2026-21928 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3581.

When was CVE-2026-21928 published?

CVE-2026-21928 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2026-21928

CVE-2026-21928 is a medium-severity vulnerability in Oracle Solaris with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3581
Weakness: CWE-200
Affected product: Oracle Solaris
Published: 2026-01-20
Last modified: 2026-06-17

Description

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).

Frequently asked questions

What is 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).
How severe is CVE-2026-21928?: CVE-2026-21928 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-21928 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21928?: CVE-2026-21928 affects Oracle Solaris. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21928?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21928 have an EU (EUVD) identifier?: Yes. CVE-2026-21928 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3581.
When was CVE-2026-21928 published?: CVE-2026-21928 was published on 2026-01-20 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpujan2026.html

Affected products (1)

cpe:2.3:o:oracle:solaris:11:*:*:*:*:*:*:*

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