Stack-based Buffer Overflow in Junos OS Affects Juniper Networks' Routing Protocol Daemon
CVE-2026-33789

9.2CRITICAL

Key Information:

Vendor

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

Badges

👾 Exploit Exists

What is CVE-2026-33789?

A Stack-based Buffer Overflow vulnerability exists in the routing protocol daemon (rpd) of Juniper Networks' Junos OS and Junos OS Evolved. This weakness allows an unauthenticated BGP peer to execute crafted BGP route updates, which can lead to a denial of service and enable potential root-level command execution when the BGP Monitoring Protocol (BMP) is activated. Organizations utilizing affected versions of Junos OS should take immediate actions to mitigate the security risk.

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:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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