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    CVE-2026-101991

    An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured BGP-LS peer to cause heap data disclosure via a malformed UPDATE sent over a session with the traffic-engineering address family enabled.

    Published:Oct 14, 2026
    Last Modified:Oct 16, 2026
    EPS:Oct 14, 2026
    EPSS Score:0.00189
    CVSS Score:3.1

    Affected Products

    Vendor
    Juniper Networks
    Product
    Junos Os
    Vendor
    Juniper Networks
    Product
    Junos Os Evolved

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-47 Buffer Overflow via Parameter Expansion

    Related CVEs

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    CVE-2026-101952 (CVSS 8.7) — An Improper Validation of Consistency within Input vulnerability in the routing protocol daemon (rpd) of Junip…
    CVE-2026-101949 (CVSS 8.7) — A NULL Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and…
    CVE-2026-101964 (CVSS 7.1) — A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juno…
    CVE-2026-101963 (CVSS 8.7) — An Incorrect Calculation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and J…
    CVE-2026-101962 (CVSS 8.7) — An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of J…
    CVE-2026-101961 (CVSS 8.7) — A NULL Pointer Dereference vulnerability in the routing-policy nexthop-ECMP matcher of Juniper Networks Junos …
    CVE-2026-101959 (CVSS 7.1) — A Function Call With Incorrect Variable or Reference as Argument vulnerability in the routing protocol daemon …
    CVE-2026-101983 (CVSS 9.3) — A Stack-based Buffer Overflow vulnerability in the httpd process of Juniper Networks Junos OS and Junos OS Evo…
    CVE-2026-101982 (CVSS 9.3) — A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS…

    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