CVE-2026-4621

{"id": "CVE-2026-4621", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.6, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 2.2}], "cvssMetricV40": [{"type": "Secondary", "source": "psirt-info@cyber.jp.nec.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-03-27T12:16:20.910", "references": [{"url": "https://jpn.nec.com/security-info/secinfo/nv26-001_en.html", "tags": ["Vendor Advisory"], "source": "psirt-info@cyber.jp.nec.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt-info@cyber.jp.nec.com", "description": [{"lang": "en", "value": "CWE-912"}]}], "descriptions": [{"lang": "en", "value": "Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network."}], "lastModified": "2026-04-20T15:20:06.500", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200hp4_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ABEF9893-7104-4EFB-8504-58F2B8CF95D4"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200hp4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5A89DF7B-F002-43C6-BD55-AD93A12522E5"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg2600hs_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B9BC68AC-B83D-4E0B-9B8D-23477CE698B5", "versionEndExcluding": "1.7.2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg2600hs:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "623C9C7B-C947-49A8-9C1D-20B23FDA73ED"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wf1200cr_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FE8EF43A-B179-4352-A9C9-09A13AEB63AC", "versionEndExcluding": "1.6.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wf1200cr:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "3A91D9EB-5962-498E-9B14-C5712DDDF7C2"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200cr_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D1BD83BE-3C42-417E-838F-A5D6FB63443F", "versionEndExcluding": "1.5.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200cr:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "936D9DD3-11E5-4862-B157-85B13EA06C38"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg2600hp4_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7E67DF3D-78B9-4B64-B3D1-B3A0B9951B83", "versionEndExcluding": "1.4.2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg2600hp4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "2CA71E45-3623-423D-A1E7-FA7617A22EBD"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg2600hm4_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8631153A-E9AE-4288-B1BD-B035CF51063C", "versionEndExcluding": "1.4.2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg2600hm4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "20D6198A-B5F8-4E5E-94AE-0C657EBAB137"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg2600hs2_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B3D92216-F37F-49DE-978E-CB9A657D3FE7", "versionEndExcluding": "1.3.2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg2600hs2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "EA952A10-D2C7-4155-B805-B5DE9CFA5B96"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wx3000hp_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B4C5E53E-B37C-4FA6-BE0E-F78C168A7E8C", "versionEndExcluding": "2.5.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wx3000hp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "4F34C11C-91C8-4DE6-B170-06C857E9E3F3"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wx3600hp_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "555D2A1F-56A2-48E3-A046-FBF1EAF865B6", "versionEndIncluding": "1.5.3"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wx3600hp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "49BA8EF7-AE6D-4E69-A14B-410127D41E01"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_w1200ex-ms_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EAFDE7A7-2355-434E-929A-E50B0BD5F584"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_w1200ex-ms:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "29756D80-6095-4CCA-9436-FA61503B2E47"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200hp2_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4C68B7B4-AA6C-4222-BDC4-AF1E442B248A"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200hp2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "90D0B0AE-064D-4E48-9155-47ECDFBAAE26"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1900hp_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B0826424-1B25-44AD-A60D-7B62C1148B1C"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1900hp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1EE892DF-9165-4ED3-B5F4-B3232BC7B07A"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200hs2_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DD777679-3495-4BDE-923C-5196FB8D2788"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200hs2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "65C2F75B-CA40-4795-ABD4-2101A1DF1EDA"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1800hp3_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BFF80998-6400-48F3-A990-D5B87C665D34"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1800hp3:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "87EF7C61-A13A-4EF8-8034-90D7E2AD3A86"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200hp3_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8BB35FC8-62FF-4A6D-AB97-883FCEE8307B"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200hp3:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "FB299D6D-056F-4F75-AD19-81F11C79CA08"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1900hp2_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5E2AB180-F2E1-47F9-BBB1-A2D94325DEDC"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1900hp2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "189508FB-75EC-49CE-A6F5-3E4A8F3E57E7"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200hs3_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "644FC7C2-94C6-48DF-B487-2F97FF752CAB"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200hs3:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "0BE6AFC0-F46F-491F-88E0-5EB17420F5EE"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1800hp4_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "64691C9F-576D-416E-A6B0-042FEE21DD06"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1800hp4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D9130B16-D277-4335-8FBF-83715094FA70"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wg1200hs4_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E9E29E36-6D47-4CD4-BEDB-7F480FBF2834"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wg1200hs4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "F4840DCB-8E32-4989-A89E-BA787CE4B3F9"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wx1500hp_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2724C104-05C2-4907-A2DE-E6E3D3BC1E8F", "versionEndExcluding": "1.4.2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wx1500hp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1326D2EC-FF31-45A7-8DCE-1371DA0FD779"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:nec:aterm_wx3000hp2_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DC5AF3B6-76AD-4E18-8427-61D0D8260AD1", "versionEndExcluding": "1.3.2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:nec:aterm_wx3000hp2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A2D80835-26A0-48E9-AF95-76F06ADB21EF"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "psirt-info@cyber.jp.nec.com"}