Oracle Solaris: Local compromise by low-privileged user in Services
Summary
Oracle Solaris 11.4 is affected by a vulnerability in the Services component. A local attacker with a low-privileged logon on the host can compromise the system, with high impact on confidentiality, integrity and availability. The flaw is not reachable over the network, so the risk is highest on multi-user Solaris hosts or where untrusted local accounts exist.
Affected
- Oracle Solaris 11.4 (Services component)
- Oracle lists no other affected versions for this CVE.
Fixed in
- Included in Oracle's October 2026 Critical Patch Update (released 20 October 2026).
- Specific patch or SRU identifiers for this CVE: Unknown. Check the Solaris section of the Oracle advisory or the Solaris 11.4 SRU for October 2026 in My Oracle Support.
Workaround
- No workaround is needed because a patch exists.
- Whether Oracle documents an interim mitigation: Unknown.
Exploitation
- Exploited in the wild: no evidence found.
- Public proof of concept: no evidence found.
- EPSS: 0.00151 (low).
- CISA SSVC: Exploitation none, not automatable, total technical impact.
- CISA KEV: not checked.
Our recommendation
- Install the October 2026 Solaris 11.4 CPU patches as a bundle, starting with hosts that are reachable over the network or have several local users.
- Review local accounts on Solaris systems and remove unneeded ones.
- Check whether CVE-2026-91252 (Services, HTTP, CVSS 8.2) also affects your Solaris 11.4 servers and patch it in the same cycle.
- Confirm the CISA KEV status before relying on the 'not exploited' finding.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle CPU October 2026 advisory www.oracle.com
- Oracle security alerts index www.oracle.com
- Oracle CPU October 2026 announcement blogs.oracle.com
- CNA/NVD metadata mirror vulners.com
- VulDB entry vuldb.com
- Third-party description www.strix.ai
- Related: CVE-2026-91252 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 23:22.
Original description (NVD)
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 logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks of this vulnerability can result in takeover of Oracle Solaris. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.