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IBM i EUVDEUVD-2026-71600

| CVE-2026-18858 MEDIUM
Privilege Defined With Unsafe Actions (CWE-267)
2026-09-04 psirt@us.ibm.com GHSA-7qxf-jvwj-cmgq
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
3.3 LOW

Local authenticated access required (AV:L/PR:L); only limited file disclosure with no integrity or availability impact (C:L/I:N/A:N), consistent with vendor scoring.

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

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

3
Severity Changed
Sep 08, 2026 - 21:53 NVD
LOW MEDIUM
CVSS changed
Sep 08, 2026 - 21:53 NVD
3.3 (LOW) 5.5 (MEDIUM)
Analysis Generated
Sep 04, 2026 - 16:37 vuln.today

DescriptionNVD

IBM i 7.6, and 7.5 could allow a local authenticated attacker to obtain information from a privileged file when using SSH.

AnalysisAI

IBM i versions 7.5 and 7.6 expose privileged file contents to locally authenticated users operating over SSH, allowing a low-privilege account to read information that should be restricted by the operating system's privilege model. The vulnerability is rooted in CWE-267 (Privilege Defined With Unsafe Actions), meaning the IBM i SSH subsystem permits file access operations that violate the intended privilege boundary for the relevant file. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid local user account on the target IBM i 7.5 or 7.6 system with SSH access enabled (PR:L). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.3 Low rating accurately characterizes the constrained attack surface: exploitation requires pre-existing local system access with at least low privileges (AV:L, PR:L), and the confidentiality impact is limited to partial disclosure (C:L) with no integrity or availability component. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the IBM-provided fix detailed in the vendor advisory at https://www.ibm.com/support/pages/node/7285938; IBM i patches are typically delivered as Program Temporary Fixes (PTFs) and the specific PTF numbers should be obtained directly from that page. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-71600 vulnerability details – vuln.today

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