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    CVE-2026-17255

    IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper validation of the prefix length in ICMPv6 Router Advertisements.

    Published:Sep 4, 2026
    Last Modified:Sep 10, 2026
    EPS:Sep 4, 2026
    EPSS Score:0.00405
    CVSS Score:4.3

    Affected Products

    Vendor
    Ibm
    Product
    I

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-16693 (CVSS 4.4) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to obtain sensitive information due t…
    CVE-2026-16826 (CVSS 5.3) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to execute arbitrary commands due to improper neutra…
    CVE-2026-16892 (CVSS 5.4) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due t…
    CVE-2026-16941 (CVSS 4.3) — IBM i 7.6, 7.5, and 7.4 could allow a remote authenticated attacker to modify certain system messages due to i…
    CVE-2026-17057 (CVSS 6.5) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service and affect data integr…
    CVE-2026-17207 (CVSS 6.5) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service and compromise integri…
    CVE-2026-17259 (CVSS 4.3) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to cause a denial of service due to a…
    CVE-2026-17270 (CVSS 4.3) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to a stack-based bu…
    CVE-2026-17273 (CVSS 6.5) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to cause a denial of service due to a…
    CVE-2026-17274 (CVSS 5.4) — IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due t…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High