What is the CVSS score of CVE-2026-18069?

CVE-2026-18069 has a CVSS 3.1 base score of 6.0 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.1%.

IBM CVE-2026-18069

EUVD-2026-78147 MEDIUM

Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)

2026-09-14 psirt@us.ibm.com

GHSA-vg4x-9q67-743r

Information Disclosure IBM

6.0

CVSS 3.1 · Vendor: us

View

Vulnerability Assessment

Weakness

CWE

CWE-367

ASVS 5.0

V15 - Secure Coding and Architecture TOCTOU prevention

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

A time-of-check to time-of-use (TOCTOU) race condition in IBM i releases 7.3, 7.4, 7.5, and 7.6 lets a local attacker win a race window during a privileged file-ownership operation and end up owning arbitrary file system objects on the system. Successful exploitation yields low-level confidentiality, integrity, and availability impact but crosses a security boundary (CVSS scope change), meaning objects outside the attacker's own authority can be reassigned. No public exploit code or CISA KEV entry was identified at time of analysis, and no EPSS score was supplied; the CVSS base score is 6.0.

Affected VersionsENISA

i 7.3

i 7.6

i 7.4

i 7.5

Affected Packages

euvd i no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (us) PRIMARY 6.0 MEDIUM

AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

Primary rating from Vendor (us) · only source for this CVE.

CVSS VectorVendor: us

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

DescriptionCVE.org

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to obtain ownership of arbitrary file system objects due to a time-of-check to time-of-use (TOCTOU) race condition.

Threat Intelligence Overview

EPSS Score

0.1%

Top 97% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

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 MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +30

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.