CVE-2026-101951
Received
Received - Intake
Improper Input Validation in Juniper Junos OS BGP Peer
Vulnerability report for CVE-2026-101951, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-14
Last updated on: 2026-10-14
Assigner: Juniper Networks, Inc.
Description
Description
An Improper Validation of Consistency within Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-adjacent configured BGP peer to cause a denial of service by sending a specifically malformed BGP MCAST-TREE update and this NLRI is then attempted to be readvertised.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Juniper | Networks | Junos OS 0 |
| Juniper | Networks | Junos OS 23.4 |
| Juniper | Networks | Junos OS 24.2 |
| Juniper | Networks | Junos OS 24.4 |
| Juniper | Networks | Junos OS 25.2 |
| Juniper | Networks | Junos OS 25.4 |
| Juniper | Networks | Junos OS 26.2 |
| Juniper | Networks | Junos OS Evolved 0 |
| Juniper | Networks | Junos OS Evolved 23.4 |
| Juniper | Networks | Junos OS Evolved 24.2 |
| Juniper | Networks | Junos OS Evolved 24.4 |
| Juniper | Networks | Junos OS Evolved 25.2 |
| Juniper | Networks | Junos OS Evolved 25.4 |
| Juniper | Networks | Junos OS Evolved 26.2 |
| Juniper | Networks | Junos OS Evolved 23.4X100 |
| Juniper | Networks | Junos OS Evolved 25.2X100 |
| Juniper | Networks | Junos OS Evolved 25.4X300 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-1288 | The product receives a complex input with multiple elements or fields that must be consistent with each other, but it does not validate or incorrectly validates that the input is actually consistent. |
