CVE-2026-102024: CWE-190 Integer Overflow or Wraparound in Juniper Networks Junos OS
Description
CVE-2026-102024 is an integer overflow or wraparound vulnerability in the routing daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved. It allows an authenticated BGP peer to cause a denial of service (DoS) via BGP route updates when the extended-nexthop-tunnel feature is enabled. The vulnerability affects multiple versions of Junos OS and Junos OS Evolved prior to specific fixed releases. The CVSS score is 7.5, indicating high severity, with the impact limited to availability. No known exploits are reported in the wild, and no official patch links are provided in the data.
CVSS v3.1
Score 7.5high
Affected software
Juniper Networks
Junos OS
Juniper Networks
Junos OS Evolved
pkg:rpm/juniper/junos-ospkg:rpm/juniper/junos-os-evoRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-102024) involves an integer overflow or wraparound in the routing daemon (rpd) component of Juniper Networks Junos OS and Junos OS Evolved. When the extended-nexthop-tunnel feature is enabled, an authenticated BGP peer can send crafted BGP route updates that trigger the overflow, causing the routing daemon to crash and resulting in a denial of service. The vulnerability affects a range of versions across multiple Junos OS and Junos OS Evolved releases, as explicitly enumerated. The CVSS v3.1 base score is 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
An authenticated BGP peer can cause a denial of service by triggering an integer overflow in the routing daemon, leading to a crash or disruption of routing services. There is no impact on confidentiality or integrity. The disruption affects network availability, potentially causing network outages or degraded routing performance.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch links are provided in the input data, users should monitor Juniper Networks' official security advisories for updates and apply any available fixes promptly. Until patched, consider disabling the extended-nexthop-tunnel feature if feasible or restricting BGP peer authentication and access to trusted entities only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T17:33:49.410Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb6742cdf04f65697951a
Added to database: 10/14/2026, 17:05:56 UTC
Last enriched: 10/14/2026, 17:18:53 UTC
Last updated: 10/14/2026, 19:00:32 UTC
Views: 3
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