{"cve":"CVE-2025-27840","nvd":{"published":"2025-03-08T20:15:36.027","modified":"2026-06-17T09:04:19.343","status":"Analyzed","description":"Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","score":6.8},"cwes":["CWE-912"],"references":["https://cheriot.org/auditing/backdoor/2025/03/09/no-esp32-style-backdoor.html","https://darkmentor.com/blog/esp32_non-backdoor/","https://flyingpenguin.com/?p=67838","https://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdf","https://github.com/em0gi/CVE-2025-27840"],"products":["espressif:esp32_firmware"],"source":"nvd","synced_at":"2026-10-19T22:00:17.429720821+00:00"},"epss":{"cve":"CVE-2025-27840","score":0.01356,"percentile":0.71651,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}