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CVE-2026-17488— IBM i is Affected By An Improper Authentication Vulnerability in SST / DST

Quick assessment

Affected
IBM i
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM i 7.3、7.4、7.5 和 7.6 可能因身份验证机制存在缺陷，允许经过身份验证的远程攻击者绕过安全限制。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
IBM i 7.6 affected
7.5 affected
7.4 affected
7.3 affected
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I. Basic Information for CVE-2026-17488

Vulnerability Information
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Vulnerability Title
IBM i is Affected By An Improper Authentication Vulnerability in SST / DST
Source: CVE Program / CVE List V5
Vulnerability Description
IBM i 7.3, 7.4, 7.5, and 7.6 could allow a remote authenticated attacker to bypass security restrictions due to improper authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM i 7.6 cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-17488

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III. Intelligence Information for CVE-2026-17488

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Vendor Advisories for CVE-2026-17488 (1)

Same Patch Batch · IBM · 2026-10-16 · 9 CVEs total

CVE-2026-102917 7.8 HIGH IBM i is Affected By An Improper Privilege Management Vulnerability
CVE-2026-17068 5.4 MEDIUM IBM i is Affected By Improper Authorization and Access Control Vulnerabilities in Network
CVE-2026-17073 5.4 MEDIUM IBM i is Affected By Improper Authorization and Access Control Vulnerabilities in Network
CVE-2026-17491 5.4 MEDIUM IBM i is Affected By An Improper Privilege Management Vulnerability in OpenSSH
CVE-2026-107674 5.1 MEDIUM IBM i is Affected by a Denial of Service in Digital Certificate Manager
CVE-2026-109838 5.1 MEDIUM IBM Db2 Genius Hub Improper verification of cryptographic signature
CVE-2026-17275 3.7 LOW IBM i is Affected by an Improper Validation Vulnerability
CVE-2026-109839 3.1 LOW IBM Db2 Genius Hub Missing Cryptographic Step

IV. Related Vulnerabilities

Same product: i
Same vendor: IBM
Same weakness: CWE-287

V. Comments for CVE-2026-17488

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