CVE-2022-29855 json
Mitel 6800 and 6900 Series SIP phone devices through 2022-04-27 have "undocumented functionality." A vulnerability in Mitel 6800 Series and…
published 2022-05-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-34173
- cvss
- 6.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- mitel 6873i_sip_firmware 5.1.0.8017, 6.1.0.171
- mitel 6930_sip_firmware 5.1.0.8017, 6.1.0.171
- mitel 6940_sip_firmware 5.1.0.8017, 6.1.0.171
- mitel 6865i_sip_firmware 5.1.0.8017, 6.1.0.171
- mitel 6867i_sip_firmware 5.1.0.8017, 6.1.0.171
- mitel 6869i_sip_firmware 5.1.0.8017, 6.1.0.171
Exploit prediction
0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- seclists.org http://seclists.org/fulldisclosure/2022/Jun/32 referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com http://packetstormsecurity.com/files/167547/Mitel-6800-6900-Series-SIP-Phones-Backdoor-Access.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
References
-
seclists.org
/fulldisclosure/2022/Jun/32
mailing-list, exploit, third-party-advisory
-
packetstormsecurity.com
/files/167547/Mitel-6800-6900-Series-SIP-Phones-Backdoor-Access.html
exploit, third-party-advisory, vdb-entry
-
mitel.com
/support/security-advisories
vendor-advisory
-
mitel.com
/support/security-advisories/mitel-product-security-advisory-22-0004
vendor-advisory
-
syss.de
/pentest-blog/undocumented-functionality-backdoor-in-mitel-desk-phones-syss-2022-021
third-party-advisory
Sources
- CVE List CVE-2022-29855
- NVD CVE-2022-29855
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.