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Ubuntu EUVDEUVD-2026-88043

| CVE-2026-96283 LOW
Missing Authorization (CWE-862)
2026-09-23 vendor:ubuntu
3.3
CVSS 3.1 · Vendor: vendor:ubuntu
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Attack ChainAIDerived

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

  1. Access
    Insufficient data to determine access
  2. Exploit
    Insufficient data to determine exploit
  3. Impact
    Insufficient data to determine impact

Vulnerability Assessment

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

1 technique across 1 tactic: Privilege Escalation

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

Exploitation Conditions

Cannot be determined from available data. The description ('security update') names no product feature, protocol, configuration setting, or deployment mode, and no CVSS vector is provided to indicate attack vector, privilege, or user-interaction requirements. The affected Ubuntu-packaged component is not identified. Retrieve the source Ubuntu Security Notice (USN) and the upstream CVE to establish the exact prerequisites and limiting factors before assessing exploitability.

Impact

Risk cannot be meaningfully quantified from the provided data. There is no CVSS base score or vector, no CWE, no EPSS probability, no KEV listing, no POC reference, and no SSVC decision inputs - every scoring signal the framework relies on is absent. The description is the placeholder string 'security update', and no affected product, package, or version is named. The only concrete fact is that the record originates from an Ubuntu vendor source (consistent with an Ubuntu Security Notice/USN), which implies a fix has shipped for some Ubuntu-packaged component but does not identify the flaw class or impact. Because attack vector, complexity, privileges, and impact are all unknown, this cannot be triaged as either a genuine priority or a low-real-risk issue - it is UNDETERMINED. Any severity assertion here would be unsupported. Recommendation: retrieve the underlying USN advisory and the corresponding upstream CVE record before assigning priority; do not treat the empty description as evidence of low risk.

Exploit ScenarioDerived

No exploit scenario can be constructed because the vulnerability class, affected component, and attack vector are all unspecified in the provided data. No public exploit or POC is referenced. Consult the source Ubuntu Security Notice to determine the affected package and realistic attack path.

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

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AnalysisAIv1 – Sep 24, 2026

CVE-2026-96283 is recorded only as a vendor-reported 'security update' from Ubuntu, with no accompanying product identification, CVSS score or vector, CWE classification, or CPE data, so the impacted Ubuntu package, the affected version range, and the conditions under which the issue can be triggered are all currently undefined. No public exploit code has been identified at time of analysis, and there is no CISA KEV listing or EPSS signal provided, so active exploitation is unconfirmed. Risk cannot be meaningfully quantified from the available data, and consumers should treat this entry as a placeholder pending retrieval of the originating Ubuntu Security Notice (USN).

RemediationAI

No vendor-released patch version is identifiable from the provided data, and no affected package name is known, so a specific upgrade target cannot be cited without fabricating detail. The actionable path is to locate and read the originating Ubuntu Security Notice for CVE-2026-96283 (searchable at ubuntu.com/security/CVE-2026-96283 and in the ubuntu-security-announce archive), which will name the impacted package and the fixed version; then apply it with the standard 'apt update && apt upgrade <package>' workflow or by installing the version specified in the notice, and reboot or restart the affected service if the update covers a library or daemon. In the interim, given that exploitability, attack vector, and prerequisites are all unconfirmed, the only defensible compensating controls are generic hygiene measures rather than targeted ones: keep the ubuntu-security and ubuntu-security-announce feeds monitored so the notice is actioned promptly, enable unattended-upgrades for security pockets on internet-facing hosts, and restrict unnecessary network exposure of Ubuntu services until the affected component is known. Note that the usual trade-off of enabling automatic security upgrades is potential unplanned service restarts, which should be scheduled accordingly. Do not assume this CVE is low risk simply because no CVSS score was supplied; absence of scoring data is not evidence of low severity.

Affected ProductsAI

The affected product is an Ubuntu-packaged component that is not identified in the supplied data; no CPE strings, package names, or version ranges were provided. The single datum available is the reporter attribution to vendor:ubuntu, meaning the relevant fix will be delivered through the standard Ubuntu Security Notice and package-update channel rather than as a standalone upstream advisory. No vendor advisory URL was included in the input, so no reference link can be cited here. Determining which Ubuntu release series (for example a current LTS or interim release) and which architecture or package flavour is impacted requires pulling the specific USN referenced by this CVE identifier.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

No technical detail is available for this entry: the description consists solely of the phrase 'security update', there is no CWE to indicate a root-cause class, no CPE strings to identify the affected library, daemon, or package, and no CVSS vector to reveal attack vector, privileges required, or user-interaction requirements. The only concrete intelligence is the attribution to vendor:ubuntu, which indicates this CVE is tracked as part of the Ubuntu security update stream for one of the many upstream components Canonical packages and maintains. Because the affected component is unnamed, it is not possible to describe the underlying technology, protocol, or memory-safety or logic-error class involved, and no inference should be drawn from the placeholder text.

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Severity by source

Vendor (vendor:ubuntu) PRIMARY 3.3 LOW
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Primary rating from Vendor (vendor:ubuntu) · only source for this CVE.

CVSS VectorVendor: vendor:ubuntu

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

Lifecycle Timeline

1
CVSS changed
Sep 27, 2026 - 22:22 NVD
3.3 (LOW)

DescriptionCVE.org

security update

Threat Intelligence Overview

EPSS Score
0.1%
Top 97% exploitable
Data Quality
6 sources
Confidence: High

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

16
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +16
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.

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