CVE-2021-0288

A vulnerability in the processing of specific MPLS packets in Juniper Networks Junos OS on MX Series and EX9200 Series devices with Trio-based MPCs (Modular Port Concentrators) may cause FPC to crash and lead to a Denial of Service (DoS) condition. Continued receipt of this packet will sustain the Denial of Service (DoS) condition. This issue only affects MX Series and EX9200 Series with Trio-based PFEs (Packet Forwarding Engines). This issue affects Juniper Networks Junos OS on MX Series, EX9200 Series: 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R2-S2, 20.2R3; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2;

• CWE-754
• CWE-754

• https://kb.juniper.net/JSA11190Vendor Advisory
• https://kb.juniper.net/JSA11190Vendor Advisory

Published

Jul 15, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-0282On Juniper Networks Junos OS devices with Multipath or add-p…7.5
• CVE-2021-0283A buffer overflow vulnerability in the TCP/IP stack of Junip…7.5
• CVE-2021-0284A buffer overflow vulnerability in the TCP/IP stack of Junip…7.5
• CVE-2021-0285An uncontrolled resource consumption vulnerability in Junipe…7.5
• CVE-2021-0286A vulnerability in the handling of exceptional conditions in…7.5
• CVE-2021-0287In a Segment Routing ISIS (SR-ISIS)/MPLS environment, on Jun…6.5
• CVE-2021-0289When user-defined ARP Policer is configured and applied on o…5.3
• CVE-2021-0290Improper Handling of Exceptional Conditions in Ethernet inte…6.5
• CVE-2021-0291An Exposure of System Data vulnerability in Juniper Networks…6.5
• CVE-2021-0292An Uncontrolled Resource Consumption vulnerability in the AR…6.5
• CVE-2021-0293A vulnerability in Juniper Networks Junos OS caused by Missi…5.5
• CVE-2021-0294A vulnerability in Juniper Networks Junos OS, which only aff…5.3