Skip to main content

Oracle Solaris EUVDEUVD-2026-106461

| CVE-2026-87422 LOW
Improper Authorization (CWE-285)
2026-10-20 secalert_us@oracle.com GHSA-8xqp-7rwm-9r7m
2.5
CVSS 3.1 · Vendor: oracle
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain local logon to Solaris host
  2. Exploit
    Stage malicious input in Services component
  3. Execution
    Induce separate user to trigger it
  4. Impact
    Gain limited unauthorized data modification

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization verification
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation is confined to the Oracle Solaris 11.4 'Services' component and requires the attacker to first have local logon access to the infrastructure where Solaris runs (AV:L). It additionally requires human interaction from a person OTHER than the attacker (UI:R) - a separate legitimate user must perform some action for the attack to succeed - and the flaw is rated high complexity (AC:H), implying race conditions, specific timing, or non-trivial preconditions. These three factors (local access, dependence on a second user, and high complexity) are the primary limiters and keep realistic risk well below what a network-facing flaw would carry; impact is bounded to partial unauthorized modification of some Solaris-accessible data, with no confidentiality or availability effect.

Impact

This is a genuinely low-priority issue, and the signals align rather than conflict. The CVSS 3.1 base score is 2.5 (Low), driven by a vector of AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N - local attack vector, high attack complexity, no privileges but mandatory user interaction, and a single low-integrity impact with no confidentiality or availability consequence. No EPSS score was provided in the input, the CVE is NOT listed in CISA KEV, and no public proof-of-concept is referenced, so exploitation status is 'no public exploit identified at time of analysis.' The only meaningful real-world outcome per Oracle is unauthorized update/insert/delete access to SOME Solaris-accessible data - a limited integrity effect. Note one internal tension in Oracle's own phrasing: the vector states PR:N (no privileges) yet the description says the attacker needs 'logon to the infrastructure where Oracle Solaris executes,' meaning local presence is required even if no application credentials are - treat the AV:L/UI:R combination, not the PR:N label, as the true access barrier. Bottom line: low CVSS backed by local-only access, high complexity, and a dependency on a separate victim's interaction makes this a low real-world risk, not a hidden priority.

Exploit ScenarioDerived

An attacker who already has local logon access to a Solaris 11.4 host crafts a malicious input or file in the Services component and then waits for or socially engineers a separate legitimate user to perform an action that triggers the flaw. Because high complexity and victim interaction are both required, successful exploitation is opportunistic and yields only limited unauthorized modification of some Solaris-accessible data. No public exploit code is known at time of analysis.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Oct 21, 2026

Oracle Solaris 11.4 exposes a low-severity integrity flaw in its Services component: an attacker with local logon access and no additional privileges (PR:N) can, under high-complexity conditions and with the involvement of a second user, cause unauthorized update, insert, or delete operations against some Solaris-accessible data. The CVSS 3.1 score is 2.5 (AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N), reflecting no confidentiality or availability impact and a narrowly bounded modification-only effect; no public exploit code has been identified at time of analysis and there is no CISA KEV confirmation. The requirement for local logon plus human interaction from someone other than the attacker keeps realistic risk well below that of a network-facing service flaw.

RemediationAI

Patch available per vendor advisory: Oracle addresses CVE-2026-87422 in the Critical Patch Update for October 2026 at https://www.oracle.com/security-alerts/cpuoct2026.html, but the provided data does not specify an exact Solaris 11.4 SRU, so verify the fixed SRU in the CPU before closing the finding. Until the CPU is applied, reduce exposure by restricting local logon to the Solaris host to trusted administrators and service accounts (trade-off: may disrupt legitimate multi-user or support workflows) and by reviewing permissions for service configuration changes so that a second user's interaction cannot be leveraged to alter protected data (trade-off: tighter permissions can break automation or delegated administration). Because UI:R requires another person to act, user awareness and removal of unnecessary interactive sessions on sensitive Solaris systems are useful compensating controls, though they reduce rather than eliminate the risk.

Affected VersionsENISA

Oracle Solaris 11.4

Affected Packages

euvd oracle_solaris no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The issue sits in the Services component of Oracle Solaris 11.4, the layer that manages system service configuration and lifecycle on the Solaris platform. No CWE was supplied, so the precise root-cause class cannot be confirmed from the provided data; the assessed vector is the authoritative guide. AV:L confines the attack to a local logon, AC:H indicates race, timing, or other non-trivial preconditions, PR:N means no extra privileges beyond the ability to log on are required, and UI:R means a distinct legitimate user must take an action for exploitation to succeed. The resulting impact is C:N/I:L/A:N: limited unauthorized modification of some Solaris-accessible data, with no read or denial-of-service effect. The supplied tag "Authentication Bypass" is not supported by the assessed vector, which shows no confidentiality or availability impact; treat that tag as low-fidelity metadata rather than evidence of demonstrated bypass behavior.

Know when Solaris gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

Severity by source

Vendor (oracle) PRIMARY 2.5 LOW
AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
vuln.today AI 2.5 LOW

Local access and mandatory second-user interaction set AV:L/UI:R; non-trivial preconditions give AC:H; PR:N per Oracle; only limited data modification yields I:L with C:A:N.

3.1 AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
4.0 AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

DescriptionCVE.org

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Services). The supported version that is affected is 11.4. Difficult to exploit vulnerability allows unauthenticated 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. CVSS 3.1 Base Score 2.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).

Threat Intelligence Overview

EPSS Score
0.1%
Top 98% exploitable
Prevalence
Low
legacy enterprise Unix OS, now niche declining deployment
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Low

Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +12
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

CVE-2015-4495 HIGH POC
8.8 Aug 08

The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote

CVE-2016-3718 MEDIUM POC
5.5 May 05

The (1) HTTP and (2) FTP coders in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allow remote attackers to conduct

CVE-2016-3715 MEDIUM POC
5.5 May 05

The EPHEMERAL coder in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allows remote attackers to delete arbitrary fi

CVE-2017-3623 CRITICAL POC
10.0 Apr 24

Vulnerability in the Solaris component of Oracle Sun Systems Products Suite (subcomponent: Kernel RPC). Rated critical s

CVE-2016-2776 HIGH POC
7.5 Sep 28

buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x before 9.11.0rc3 does not properly

CVE-2017-5753 MEDIUM POC
5.6 Jan 04

Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of

CVE-2016-4971 HIGH POC
8.8 Jun 30

GNU wget before 1.18 allows remote servers to write to arbitrary files by redirecting a request from HTTP to a crafted F

CVE-2015-4024 MEDIUM POC
5.0 Jun 09

Algorithmic complexity vulnerability in the multipart_buffer_headers function in main/rfc1867.c in PHP before 5.4.41, 5.

CVE-2013-5704 MEDIUM POC
5.0 Apr 15

The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass "RequestHeader unset" directiv

CVE-2017-3629 HIGH POC
7.8 Jun 22

Vulnerability in the Solaris component of Oracle Sun Systems Products Suite (subcomponent: Kernel). Rated high severity

CVE-2015-3145 HIGH
7.5 Apr 24

The sanitize_cookie_path function in cURL and libcurl 7.31.0 through 7.41.0 does not properly calculate an index, which

CVE-2016-5387 HIGH
8.1 Jul 19

The Apache HTTP Server through 2.4.23 follows RFC 3875 section 4.1.18 and therefore does not protect applications from t

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy