CVE-2026-33789 Juniper Networks Junos OS - Buffer Overflow

Juniper Networks Junos OS and Junos OS Evolved contain a stack-based buffer overflow caused by crafted BGP route updates in the routing protocol daemon (rpd) when BGP Monitoring Protocol (BMP) is enabled, letting unauthenticated BGP peers cause denial of service and potential root-level command execution, exploit requires BMP enabled.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to the latest Junos OS and Junos OS Evolved versions with the BMP buffer overflow fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs