CVE-2026-101959

Junos OS and Junos OS Evolved: A malformed LSP-ping causes an rpd crash

State: Published
Severity: 7.1 High
Published: Oct 14, 2026
Updated: Oct 14, 2026
Reserved: Sep 28, 2026

Description

A Function Call With Incorrect Variable or Reference as Argument vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause an rpd crash via specifically malformed LSP-ping.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L	juniper
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	juniper

Weaknesses

CWE-688 Function Call With Incorrect Variable or Reference as Argument

Affected Products

Product	Versions
Junos OSJuniper Networks	before 23.2R2-S7.7Affected 23.4 to before 23.4R2-S8.13Affected 24.2 to before 24.2R2-S5.5Affected 24.4 to before 24.4R2-S5Affected 25.2 to before 25.2R2-S2Affected 25.4 to before 25.4R1-S3Affected 26.2 to before 26.2R1-S2Affected
Junos OS EvolvedJuniper Networks	before 23.2R2-S7.7-EVOAffected 23.4 to before 23.4R2-S8.11-EVOAffected 24.2 to before 24.2R2-S5.6-EVOAffected 24.4 to before 24.4R2-S5-EVOAffected 25.2 to before 25.2R2-S2-EVOAffected 25.4 to before 25.4R1-S3-EVOAffected 26.2 to before 26.2R1-S2-EVOAffected 23.4X100Affected 25.2X100 to before 25.2X100-D35-EVOAffected 25.4X300 to before 25.4X300-D40-EVOAffected

References

https://supportportal.juniper.net/JSA112187vendor-advisory

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