{"cve":"CVE-2022-29855","nvd":{"published":"2022-05-11T20:15:08.787","modified":"2026-06-17T04:40:50.570","status":"Modified","description":"Mitel 6800 and 6900 Series SIP phone devices through 2022-04-27 have \"undocumented functionality.\" A vulnerability in Mitel 6800 Series and 6900 Series SIP phones excluding 6970, versions 5.1 SP8 (5.1.0.8016) and earlier, and 6.0 (6.0.0.368) through 6.1 HF4 (6.1.0.165), could allow a unauthenticated attacker with physical access to the phone to gain root access due to insufficient access control for test functionality during system startup. A successful exploit could allow access to sensitive information and code execution.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":6.8},"cwes":[],"references":["http://packetstormsecurity.com/files/167547/Mitel-6800-6900-Series-SIP-Phones-Backdoor-Access.html","http://seclists.org/fulldisclosure/2022/Jun/32","https://www.mitel.com/support/security-advisories","https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-22-0004","https://www.syss.de/pentest-blog/undocumented-functionality-backdoor-in-mitel-desk-phones-syss-2022-021"],"products":["mitel:6865i_sip_firmware","mitel:6867i_sip_firmware","mitel:6869i_sip_firmware","mitel:6873i_sip_firmware","mitel:6905_sip_firmware","mitel:6910_sip_firmware","mitel:6920_sip_firmware","mitel:6930_sip_firmware","mitel:6940_sip_firmware"],"source":"nvd","synced_at":"2026-10-19T21:31:59.322382750+00:00"},"epss":{"cve":"CVE-2022-29855","score":0.00789,"percentile":0.5624,"date":"2026-10-31"},"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."]}