CVE-2026-33789 vulnerability in Juniper Networks Products
Published on October 14, 2026
Junos OS and Junos OS Evolved: With BGP Monitoring Protocol is enabled, receipt of a specifically crafted BGP route update results in denial of service
A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated BGP peer to cause a denial of service and potential root-level command execution via crafted BGP route updates when the BGP Monitoring Protocol (BMP) is enabled.
Vulnerability Analysis
CVE-2026-33789 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-33789 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-33789
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Affected Versions
Juniper Networks Junos OS:- Before 23.2R2-S7.7 is affected.
- Version 23.4 and below 23.4R2-S8.13 is affected.
- Version 24.2 and below 24.2R2-S5.5 is affected.
- Version 24.4 and below 24.4R2-S5 is affected.
- Version 25.2 and below 25.2R2-S2 is affected.
- Version 25.4 and below 25.4R1-S3 is affected.
- Version 26.2 and below 26.2R1-S2 is affected.
- Before 23.2R2-S7.7-EVO is affected.
- Version 23.4 and below 23.4R2-S8.11-EVO is affected.
- Version 24.2 and below 24.2R2-S5.6-EVO is affected.
- Version 24.4 and below 24.4R2-S5-EVO is affected.
- Version 25.2 and below 25.2R2-S2-EVO is affected.
- Version 25.4 and below 25.4R1-S3-EVO is affected.
- Version 26.2 and below 26.2R1-S2-EVO is affected.
- Version 23.4X100 is affected.
- Version 25.2X100 and below 25.2X100-D35-EVO is affected.
- Version 25.4X300 and below 25.4X300-D40-EVO is affected.