CVE-2026-102027
Junos OS and Junos OS Evolved: A configured BGP neighbor causes rpd crash when multipath next-hops are processed
Juniper Networks Junos OSNetwork & edge
CVSS
7.5HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.46%Chance of exploitation activity in the next 30 days, higher than 38% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 24.4R2-S5Junos OSCVE List
- 25.2R2-S2Junos OSCVE List
- 25.4R1-S3Junos OSCVE List
- 26.2R1-S2Junos OSCVE List
- 24.4R2-S5-EVOJunos OS EvolvedCVE List
- 25.2R2-S2-EVOJunos OS EvolvedCVE List
Show all 10 fixed versions
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured eBGP neighbor to cause an rpd crash via BGP labeled-unicast UPDATEs when the affected multipath features are enabled.
Text from CVE List
Affected versions 10
- Junos OSaffected: 24.4 before 24.4R2-S5CVE List
- Junos OSaffected: 25.2 before 25.2R2-S2CVE List
- Junos OSaffected: 25.4 before 25.4R1-S3CVE List
- Junos OSaffected: 26.2 before 26.2R1-S2CVE List
- Junos OS Evolvedaffected: 24.4 before 24.4R2-S5-EVOCVE List
- Junos OS Evolvedaffected: 25.2 before 25.2R2-S2-EVOCVE List
- Junos OS Evolvedaffected: 25.4 before 25.4R1-S3-EVOCVE List
- Junos OS Evolvedaffected: 26.2 before 26.2R1-S2-EVOCVE List
- Junos OS Evolvedaffected: 25.2X100 before 25.2X100-D35-EVOCVE List
- Junos OS Evolvedaffected: 25.4X300 before 25.4X300-D40-EVOCVE List