NULL Pointer Dereference in Junos OS Affects Juniper Networks Routing Protocol Daemon
CVE-2026-101949

8.7HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-101949?

A NULL Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks' Junos OS and Junos OS Evolved affects BGP operations. An unauthenticated remote BGP neighbor can exploit this weakness by sending a VPN-flowspec BGP update, which, if readvertised and monitored with BMP post-policy RIB-out, can result in a denial of service. This vulnerability poses significant risks to network stability, particularly in environments relying on BGP for routing configurations.

Affected Version(s)

Junos OS 0 < 23.2R2-S7.7

Junos OS 23.4 < 23.4R2-S8.13

Junos OS 24.2 < 24.2R2-S5.5

References

https://supportportal.juniper.net/JSA112187
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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