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                "id": "CVE-2025-52947",
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2025-07-11T15:25:03.681598Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          "defaultStatus": "unaffected",
          "platforms": [
            "ACX1000",
            "ACX1100",
            "ACX2000",
            "ACX2100",
            "ACX2200",
            "ACX4000",
            "ACX5048",
            "ACX5096"
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          "product": "Junos OS",
          "vendor": "Juniper Networks",
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              "lessThan": "21.2R3-S9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
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              "value": "This issue only occurs when an L2 circuit is configured for hot-standby.\u0026nbsp; For example:\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e[protocols l2circuit neighbor x.x.x.x interface \u0026lt;intf\u0026gt; backup-neighbor x.x.x.x hot-standby]\u003c/tt\u003e"
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          "value": "This issue only occurs when an L2 circuit is configured for hot-standby.\u00a0 For example:\n\n[protocols l2circuit neighbor x.x.x.x interface \u003cintf\u003e backup-neighbor x.x.x.x hot-standby]"
        }
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      "datePublic": "2025-07-09T16:00:00.000Z",
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              "value": "An Improper Handling of Exceptional Conditions vulnerability in route processing of Juniper Networks Junos OS on specific end-of-life (EOL) ACX Series platforms allows an attacker to crash the Forwarding Engine Board (FEB) by flapping an interface, leading to a Denial of Service (DoS).\u003cbr\u003e\u003cbr\u003eOn\u0026nbsp;ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096 devices, FEB0 will crash when the primary path port of the L2 circuit IGP (Interior Gateway Protocol) on the local device goes down. This issue is seen only when \u0027hot-standby\u0027 mode is configured for the L2 circuit.\u003cbr\u003e\u003cbr\u003e\u003cp\u003eThis issue affects Junos OS on ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eall versions before 21.2R3-S9.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e"
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          "value": "An Improper Handling of Exceptional Conditions vulnerability in route processing of Juniper Networks Junos OS on specific end-of-life (EOL) ACX Series platforms allows an attacker to crash the Forwarding Engine Board (FEB) by flapping an interface, leading to a Denial of Service (DoS).\n\nOn\u00a0ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096 devices, FEB0 will crash when the primary path port of the L2 circuit IGP (Interior Gateway Protocol) on the local device goes down. This issue is seen only when \u0027hot-standby\u0027 mode is configured for the L2 circuit.\n\nThis issue affects Junos OS on ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096:\u00a0\n\n\n\n  *  all versions before 21.2R3-S9."
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              "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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            "baseSeverity": "MEDIUM",
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            "providerUrgency": "GREEN",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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            "vulnAvailabilityImpact": "HIGH",
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-755",
              "description": "CWE-755 Improper Handling of Exceptional Conditions",
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              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2025-07-11T14:40:14.792Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
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      "references": [
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          "tags": [
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          "url": "https://supportportal.juniper.net/JSA100051"
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              "value": "The following software releases have been updated to resolve this specific issue: 21.2R3-S9.\u003cbr\u003e\u003cbr\u003eNote: Support for the ACX2k Series ended with Junos OS 21.2."
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          ],
          "value": "The following software releases have been updated to resolve this specific issue: 21.2R3-S9.\n\nNote: Support for the ACX2k Series ended with Junos OS 21.2."
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      "source": {
        "advisory": "JSA100051",
        "defect": [
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        "discovery": "USER"
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      "title": "Junos OS: ACX Series: When \u0027hot-standby\u0027 mode is configured for an L2 circuit, interface flap causes the FEB to crash",
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    "assignerShortName": "juniper",
    "cveId": "CVE-2025-52947",
    "datePublished": "2025-07-11T14:40:14.792Z",
    "dateReserved": "2025-06-23T13:16:01.408Z",
    "dateUpdated": "2025-07-11T15:25:08.865Z",
    "state": "PUBLISHED"
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  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-52947\",\"sourceIdentifier\":\"sirt@juniper.net\",\"published\":\"2025-07-11T15:15:25.000\",\"lastModified\":\"2025-07-15T13:14:49.980\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An Improper Handling of Exceptional Conditions vulnerability in route processing of Juniper Networks Junos OS on specific end-of-life (EOL) ACX Series platforms allows an attacker to crash the Forwarding Engine Board (FEB) by flapping an interface, leading to a Denial of Service (DoS).\\n\\nOn\u00a0ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096 devices, FEB0 will crash when the primary path port of the L2 circuit IGP (Interior Gateway Protocol) on the local device goes down. This issue is seen only when \u0027hot-standby\u0027 mode is configured for the L2 circuit.\\n\\nThis issue affects Junos OS on ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096:\u00a0\\n\\n\\n\\n  *  all versions before 21.2R3-S9.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de Manejo Inadecuado de Condiciones Excepcionales en el procesamiento de rutas de Juniper Networks Junos OS en plataformas espec\u00edficas de la serie ACX al final de su vida \u00fatil (EOL) permite a un atacante bloquear la placa del motor de reenv\u00edo (FEB) mediante la fluctuaci\u00f3n de una interfaz, lo que provoca una denegaci\u00f3n de servicio (DoS). En los dispositivos ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048 y ACX5096, FEB0 se bloquea cuando falla el puerto de ruta principal del protocolo de puerta de enlace interior (IGP) del circuito L2 del dispositivo local. Este problema solo se observa cuando se configura el modo de espera activa para el circuito L2. Este problema afecta a Junos OS en ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048 y ACX5096: * todas las versiones anteriores a 21.2R3-S9.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"sirt@juniper.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/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:X/R:A/V:X/RE:M/U:Green\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"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\":\"NOT_DEFINED\",\"Recovery\":\"AUTOMATIC\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"MODERATE\",\"providerUrgency\":\"GREEN\"}}],\"cvssMetricV31\":[{\"source\":\"sirt@juniper.net\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"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-755\"}]}],\"references\":[{\"url\":\"https://supportportal.juniper.net/JSA100051\",\"source\":\"sirt@juniper.net\"}]}}"
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