High severity · published Oct 20, 2026
CVE-2026-91256
Vulnerability in the Oracle Solaris product of Oracle Systems (component: Services)
7.1
CVSS
0.4%
EPSS
No
On KEV
Description
Vulnerability in the Oracle Solaris product of Oracle Systems (component: Services). The supported version that is affected is 11.4. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Solaris. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris and unauthorized read access to a subset of Oracle Solaris accessible data. CVSS 3.1 Base Score 7.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OS
Oracle Solaris · Oracle Corporation
11.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91256
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91256
www.oracle.com
https://www.oracle.com/security-alerts/cpuoct2026.html
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