Stack-based Buffer Overflow in Juniper Networks Junos OS BGP Routing Daemon
CVE-2026-102178

9.3CRITICAL

Key Information:

Vendor

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

Badges

👾 Exploit Exists

What is CVE-2026-102178?

A stack-based buffer overflow vulnerability in the BGP routing daemon of Juniper Networks' Junos OS and Junos OS Evolved enables a configured BGP flowspec peer to potentially compromise the routing engine or induce a denial of service in the routing daemon through the re-advertisement of flowspec routes, particularly when BGP update-threading is activated. This vulnerability could expose critical network routing functions to exploitation, emphasizing the need for prompt remediation.

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:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
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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