{"identifier":"CVE-2026-40003","cve":{"id":"CVE-2026-40003","description":"ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB. Attackers can exploit the lack of target address validation in the USB download mode to write data to any location in BootROM runtime memory, thereby overwriting the stack, hijacking the execution flow, bypassing the Secure Boot signature verification mechanism, and achieving unauthorized code execution.","published":"2026-05-07T02:16:03.453000+00:00","modified":"2026-10-26T19:10:00.163000+00:00","status":"Analyzed","score":5.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:o:zte:zx297520v3_firmware:-:*:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""}],"weaknesses":["CWE-787"],"references":[{"url":"https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645","source":"psirt@zte.com.cn","tags":["Vendor Advisory"]}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"psirt@zte.com.cn","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L","baseScore":5.1,"baseSeverity":"MEDIUM","attackVector":"PHYSICAL","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"LOW"},"exploitabilityScore":0.4,"impactScore":4.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":6.8,"baseSeverity":"MEDIUM","attackVector":"PHYSICAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":0.9,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-07T13:04:46.979027Z","id":"CVE-2026-40003","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:zte:zx297520v3_firmware:-:*:*:*:*:*:*:*","matchCriteriaId":"6E69F8B0-75E7-4BD9-A4C7-4F3CF428CEE7"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:zte:zx297520v3:-:*:*:*:*:*:*:*","matchCriteriaId":"B664C83E-0249-47BB-A3AD-1E9C4DF34206"}]}]}],"source":"nvd","retrieved_at":"2026-10-28T10:20:04.773981+00:00","exploited":false,"kev_stale":false,"products":["zte / zx297520v3 firmware"],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00296,"percentile":0.22183,"date":"2026-10-28","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"support.zte.com.cn","source_url":"https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645","investigate_url":"https://investigate.aeglixmind.com/#support.zte.com.cn"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-40003","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-40003","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-40003","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}