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CVE-2026-17262— IBM i is Affected By Denial of Service and Security Restriction Bypass Vulnerabilities in FTP [, ]

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 7.6、7.5、7.4 和 7.3 版本存在一个漏洞，可能导致本地攻击者通过不当的 FTP 认证命令验证机制，从而引发拒绝服务（DoS）攻击。

CVSS 5.4 · 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-2026-17262

Vulnerability Information
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Vulnerability Title
IBM i is Affected By Denial of Service and Security Restriction Bypass Vulnerabilities in FTP [, ]
Source: CVE Program / CVE List V5
Vulnerability Description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to improper validation of FTP authentication commands.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
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-2026-17262

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III. Intelligence Information for CVE-2026-17262

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Vendor Advisories for CVE-2026-17262 (1)

Same Patch Batch · IBM · 2026-09-18 · 90 CVEs total

CVE-2025-15399 10.0 CRITICAL Multiple vulnerabilities affect IBM License Key Server Administration and Reporting Tool a
CVE-2026-10747 10.0 CRITICAL IBM MQ Appliance is affected by a heap buffer overflow vulnerability in protocol message p
CVE-2026-84064 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84075 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-10858 9.9 CRITICAL IBM MQ for HPE NonStop is vulnerable to a denial of service attack
CVE-2026-80442 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84078 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82967 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-80441 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-81657 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84082 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82340 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82832 9.6 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-75878 9.1 CRITICAL IBM Sterling File Gateway is Vulnerable to Authentication Bypass
CVE-2026-84073 9.1 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84031 9.0 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84070 8.9 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84106 8.9 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84074 8.9 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82887 8.8 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.

Showing top 20 of 90 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: i
Same vendor: IBM
Same weakness: CWE-78

V. Comments for CVE-2026-17262

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