Description
An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker sending a specifically malformed BGP EVPN multicast update which is attempted to be readvertised to cause an rpd crash.
Published: 2026-10-14
Score: 8.7 High
EPSS: n/a
KEV: No
AI Analysis

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Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases. Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases. Note: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.

Vendor Workaround

If not required EVPN multicast updates can be filtered with an import policy on the resp. BGP peers: [ policy-options policy-statement EVPN-NO-MCAST term reject from family evpn ] [ policy-options policy-statement EVPN-NO-MCAST term reject from nlri-route-type [ 6 7 8 10 ] ] [ policy-options policy-statement EVPN-NO-MCAST term reject then reject ] [ protocols bgp group <group> import EVPN-NO-MCAST ]

Tracking

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Advisories

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History

Wed, 14 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Description An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker sending a specifically malformed BGP EVPN multicast update which is attempted to be readvertised to cause an rpd crash.
Title Junos OS and Junos OS Evolved: An attacker sending a malformed update causes an rpd crash when BGP EVPN signaling is used
Weaknesses CWE-130
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published:

Updated: 2026-10-14T20:26:07.845Z

Reserved: 2026-09-28T16:28:35.625Z

Link: CVE-2026-101962

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T18:17:11.777

Modified: 2026-10-14T21:17:22.577

Link: CVE-2026-101962

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-14T21:30:08Z

Weaknesses
  • CWE-130

    Improper Handling of Length Parameter Inconsistency