CVE-2021-0286

A vulnerability in the handling of exceptional conditions in Juniper Networks Junos OS Evolved (EVO) allows an attacker to send specially crafted packets to the device, causing the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) process to crash and restart, impacting all traffic going through the FPC, resulting in a Denial of Service (DoS). Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. Following messages will be logged prior to the crash: Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:35 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:37 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:44 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:47 Feb 2 10:14:39 fpc0 audit[16263]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=11 Feb 2 10:14:39 fpc0 kernel: audit: type=1701 audit(1612260879.272:17): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=1 This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.

• CWE-703
• CWE-754

• https://kb.juniper.net/JSA11188Vendor Advisory
• https://kb.juniper.net/JSA11188Vendor 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-2021-0280Due to an Improper Initialization vulnerability in Juniper N…7.5
• CVE-2021-0281On Juniper Networks Junos OS devices configured with BGP ori…7.5
• 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-2021-0287In a Segment Routing ISIS (SR-ISIS)/MPLS environment, on Jun…6.5
• CVE-2021-0288A vulnerability in the processing of specific MPLS packets i…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