CVE-2026-57032 (GCVE-0-2026-57032)

Vulnerability from cvelistv5 – Published: 2026-07-09 21:14 – Updated: 2026-07-09 21:14
VLAI
Title
Junos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc process crash
Summary
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). If 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.  The following log message can be seen when this issue happens: agentd[<PID>]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for <sensor> This issue affects Junos OS on EX2300, EX3400, EX4000, EX4100 and EX4400 devices: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S5, * 24.4 versions before 24.4R2.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1 (High)
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
CWE
  • CWE-236 - Improper Handling of Undefined Parameters
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: 0 , < 23.2R2-S7 (custom)
Affected: 23.4 , < 23.4R2-S8 (custom)
Affected: 24.2 , < 24.2R2-S5 (custom)
Affected: 24.4 , < 24.4R2 (custom)
Create a notification for this product.
Date Public
2026-07-08 16:00
Show details on NVD website
To clipboard 

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          "platforms": [
            "EX3400",
            "EX4100",
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          "product": "Junos OS",
          "vendor": "Juniper Networks",
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              "value": "To be exposed to this issue gRPC needs to be enabled via at least one of:\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e[ system services http servers ]\u003cbr\u003e[ system services extension-service request-response grpc ]\u003c/tt\u003e"
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      "datePublic": "2026-07-08T16:00:00.000Z",
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              "value": "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).\u003cp\u003e\n\nIf an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300,\u0026nbsp;EX3400,\u0026nbsp;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.\u0026nbsp;\u003c/p\u003e\u003cp\u003eThe following log message can be seen when this issue happens:\u003c/p\u003e\u003ctt\u003eagentd[\u0026lt;PID\u0026gt;]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for \u0026lt;sensor\u0026gt;\u003c/tt\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThis issue affects Junos OS on \n\n\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eEX2300, EX3400, EX4000, EX4100 and EX4400\u003c/span\u003e\n\ndevices:\u003cbr\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eall versions before 23.2R2-S7,\u003c/li\u003e\u003cli\u003e23.4 versions before 23.4R2-S8,\u003c/li\u003e\u003cli\u003e24.2 versions before  24.2R2-S5,\u003c/li\u003e\u003cli\u003e24.4 versions before 24.4R2.\u003c/li\u003e\u003c/ul\u003e\u003cbr\u003e\u003cp\u003e\u003c/p\u003e"
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          "value": "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,\u00a0EX3400,\u00a0EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted.\u00a0\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."
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      "providerMetadata": {
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          "tags": [
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      "source": {
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      "title": "Junos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc process crash",
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    "cveId": "CVE-2026-57032",
    "datePublished": "2026-07-09T21:14:11.048Z",
    "dateReserved": "2026-06-23T16:27:00.249Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-57032\",\"sourceIdentifier\":\"sirt@juniper.net\",\"published\":\"2026-07-09T22:17:09.007\",\"lastModified\":\"2026-07-09T22:17:09.007\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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,\u00a0EX3400,\u00a0EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted.\u00a0\\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.\"}],\"affected\":[{\"source\":\"sirt@juniper.net\",\"affectedData\":[{\"vendor\":\"Juniper Networks\",\"product\":\"Junos OS\",\"defaultStatus\":\"unaffected\",\"platforms\":[\"EX3400\",\"EX4100\",\"EX4400\",\"EX2300\",\"EX4000\"],\"versions\":[{\"version\":\"0\",\"lessThan\":\"23.2R2-S7\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"23.4\",\"lessThan\":\"23.4R2-S8\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"24.2\",\"lessThan\":\"24.2R2-S5\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"24.4\",\"lessThan\":\"24.4R2\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"sirt@juniper.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"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\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"LOW\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"YES\",\"Recovery\":\"AUTOMATIC\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"MODERATE\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"sirt@juniper.net\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"sirt@juniper.net\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-236\"}]}],\"references\":[{\"url\":\"https://supportportal.juniper.net/JSA110092\",\"source\":\"sirt@juniper.net\"}]}}"
  }
}



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