{"id":"CVE-2026-57032","aliases":["EUVD-2026-42723","GHSA-hp6x-whrh-rg9m"],"status":"published","title":"Junos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc process crash","description":"An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on EX Series devices allows an authenticated attacker with low privileges to cause a Denial-of-Service (DoS).\n\nIf an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300, EX3400, EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted. \n\nThe following log message can be seen when this issue happens:\n\nagentd[\u003cPID\u003e]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for \u003csensor\u003e\n\n\nThis issue affects Junos OS on \n\nEX2300, EX3400, EX4000, EX4100 and EX4400\n\ndevices:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before  24.2R2-S5,\n  *  24.4 versions before 24.4R2.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0042,"percentile":0.36817,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-236"],"published":"2026-07-09T21:14:11Z","modified":"2026-10-25T15:10:00Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA110092","tags":["vendor-advisory","Mitigation","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57032"},{"url":"https://github.com/advisories/GHSA-hp6x-whrh-rg9m"}],"sources":{"cve":[{"id":"CVE-2026-57032","title":"Junos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc process crash","description":"An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on EX Series devices allows an authenticated attacker with low privileges to cause a Denial-of-Service (DoS).\n\nIf an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300, EX3400, EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted. \n\nThe following log message can be seen when this issue happens:\n\nagentd[\u003cPID\u003e]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for \u003csensor\u003e\n\n\nThis issue affects Junos OS on \n\nEX2300, EX3400, EX4000, EX4100 and EX4400\n\ndevices:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before  24.2R2-S5,\n  *  24.4 versions before 24.4R2.","status":"published","published":"2026-07-09T21:14:11.048Z","modified":"2026-07-10T14:34:50.488Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-236"],"updated_at":"2026-11-02T13:43:44.898272Z"}],"euvd":[{"id":"EUVD-2026-42723","description":"An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on EX Series devices allows an authenticated attacker with low privileges to cause a Denial-of-Service (DoS).\n\nIf an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300, EX3400, EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted. \n\nThe following log message can be seen when this issue happens:\n\nagentd[\u003cPID\u003e]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for \u003csensor\u003e\n\n\nThis issue affects Junos OS on \n\nEX2300, EX3400, EX4000, EX4100 and EX4400\n\ndevices:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before  24.2R2-S5,\n  *  24.4 versions before 24.4R2.","status":"published","published":"2026-07-09T21:14:11Z","modified":"2026-07-10T14:34:50Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M","level":"high"}],"updated_at":"2026-11-02T18:20:03.345658Z"}],"ghsa":[{"id":"GHSA-hp6x-whrh-rg9m","title":"An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe)...","description":"An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on EX Series devices allows an authenticated attacker with low privileges to cause a Denial-of-Service (DoS).\n\nIf an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300, EX3400, EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted. \n\nThe following log message can be seen when this issue happens:\n\nagentd[\u003cPID\u003e]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for \u003csensor\u003e\n\n\nThis issue affects Junos OS on \n\nEX2300, EX3400, EX4000, EX4100 and EX4400\n\ndevices:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before  24.2R2-S5,\n  *  24.4 versions before 24.4R2.","status":"published","published":"2026-07-10T00:31:27Z","modified":"2026-07-10T00:31:33Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-236"],"updated_at":"2026-11-02T15:09:22.722529Z"}],"nvd":[{"id":"CVE-2026-57032","description":"An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on EX Series devices allows an authenticated attacker with low privileges to cause a Denial-of-Service (DoS).\n\nIf an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300, EX3400, EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted. \n\nThe following log message can be seen when this issue happens:\n\nagentd[\u003cPID\u003e]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for \u003csensor\u003e\n\n\nThis issue affects Junos OS on \n\nEX2300, EX3400, EX4000, EX4100 and EX4400\n\ndevices:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before  24.2R2-S5,\n  *  24.4 versions before 24.4R2.","status":"published","published":"2026-07-09T22:17:09.007Z","modified":"2026-10-25T15:10:00.147Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-236"],"updated_at":"2026-11-02T14:12:28.4135Z"}]}}