Medium severity · published Oct 20, 2026
CVE-2026-91209
Vulnerability in the Oracle Solaris product of Oracle Systems (component: X Window System)
4.2
CVSS
0.1%
EPSS
No
On KEV
Description
Vulnerability in the Oracle Solaris product of Oracle Systems (component: X Window System). The supported version that is affected is 11.4. Difficult to exploit vulnerability allows low 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 update, insert or delete access to some of Oracle Solaris accessible data as well as unauthorized read access to a subset of Oracle Solaris accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Solaris. CVSS 3.1 Base Score 4.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L).
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% 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-2026-91209
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91209
www.oracle.com
https://www.oracle.com/security-alerts/cpuoct2026.html
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