CVE-2026-21913

{"id": "CVE-2026-21913", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "sirt@juniper.net", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "sirt@juniper.net", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "AUTOMATIC", "baseScore": 8.7, "Automatable": "YES", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/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:Y/R:A/V:X/RE:M/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "MODERATE", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-01-15T21:16:07.537", "references": [{"url": "https://kb.juniper.net/JSA106014", "tags": ["Vendor Advisory"], "source": "sirt@juniper.net"}, {"url": "https://supportportal.juniper.net/JSA106014", "tags": ["Vendor Advisory"], "source": "sirt@juniper.net"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-665"}]}], "descriptions": [{"lang": "en", "value": "An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nOn EX4000 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP)\u00a0a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted.\n\n\n\n\nThe following reboot reason can be seen in the output of 'show chassis routing-engine' and as a log message:\n\n\u00a0 reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump \n\n\n\n\nThis issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP:\n\n\n\n * 24.4 versions before 24.4R2,\n * 25.2 versions before 25.2R1-S2, 25.2R2.\n\n\n\n\nThis issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1."}], "lastModified": "2026-01-23T19:40:56.563", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C452BDCB-34E3-42D3-8909-2312356EB70A"}, {"criteria": "cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2B8158F2-2028-40E9-955F-CFD581A32F60"}, {"criteria": "cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A7233A1-EC7A-4458-9AE1-835480A03A21"}, {"criteria": "cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D74087E2-5CAA-4085-8408-EB70EC1D5D91"}, {"criteria": "cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1B7572BB-9C77-4214-9C5F-CC83C7B93E37"}, {"criteria": "cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CAADBF98-38BE-40E2-AF1B-9077DCED0809"}, {"criteria": "cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "558F0A4C-0C72-4BF1-B2DE-C0D3BFD54BCD"}, {"criteria": "cpe:2.3:o:juniper:junos:25.2:r2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6C7B9DEB-7472-4010-8717-8050555C2FAD"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:juniper:ex4000-48mp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "62095696-9ECD-4348-9CEF-B2964ADECDC0"}, {"criteria": "cpe:2.3:h:juniper:ex4000-48p:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5D907C1B-4C3D-4280-B5D9-FA0557B5A72F"}, {"criteria": "cpe:2.3:h:juniper:ex4000-48t:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "4009C8F8-19AE-4DAF-8CF7-0DC5EA76A852"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "sirt@juniper.net"}