{"api_version":"1","generated_at":"2026-08-22T08:43:10+00:00","cve":"CVE-2026-21555","urls":{"html":"https://cve.report/CVE-2026-21555","api":"https://cve.report/api/cve/CVE-2026-21555.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-21555","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-21555"},"summary":{"title":"CVE-2026-21555","description":"In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed","state":"PUBLISHED","assigner":"Unisoc","published_at":"2026-08-03 08:17:20","updated_at":"2026-08-03 13:17:19"},"problem_types":["CWE-20","CWE-20 Improper Input Validation","CWE-20 CWE-20 Improper Input Validation"],"metrics":[{"version":"3.1","source":"security@unisoc.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://www.unisoc.com/en/support/product-security-bulletin/2084109408382668801","name":"https://www.unisoc.com/en/support/product-security-bulletin/2084109408382668801","refsource":"security@unisoc.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-21555","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21555","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Unisoc (Shanghai) Technologies Co., Ltd.","product":"UDX710","version":"affected Yocto","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"21555","cve":"CVE-2026-21555","epss":"0.004030000","percentile":"0.331630000","score_date":"2026-08-04","updated_at":"2026-08-05 00:03:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-21555","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-08-03T11:25:03.596425Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-03T11:25:18.161Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"UDX710","vendor":"Unisoc (Shanghai) Technologies Co., Ltd.","versions":[{"status":"affected","version":"Yocto"}]}],"descriptions":[{"lang":"en","value":"In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed"}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-03T07:18:31.000Z","orgId":"63f92e9c-2193-4c24-98a9-93640392c3d3","shortName":"Unisoc"},"references":[{"url":"https://www.unisoc.com/en/support/product-security-bulletin/2084109408382668801"}]}},"cveMetadata":{"assignerOrgId":"63f92e9c-2193-4c24-98a9-93640392c3d3","assignerShortName":"Unisoc","cveId":"CVE-2026-21555","datePublished":"2026-08-03T07:18:31.000Z","dateReserved":"2025-12-31T07:33:23.121Z","dateUpdated":"2026-08-03T11:25:18.161Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-03 08:17:20","lastModifiedDate":"2026-08-03 13:17:19","problem_types":["CWE-20","CWE-20 Improper Input Validation","CWE-20 CWE-20 Improper Input Validation"],"metrics":{"cvssMetricV31":[{"source":"security@unisoc.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-03T11:25:03.596425Z","id":"CVE-2026-21555","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"21555","Ordinal":"1","Title":"CVE-2026-21555","CVE":"CVE-2026-21555","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"21555","Ordinal":"1","NoteData":"In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed","Type":"Description","Title":"CVE-2026-21555"}]}}}