CVE-2022-29855
CVE-2022-29855 is a medium-severity vulnerability in Mitel 6873i Sip Firmware with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 6.8)
- CVSS v2: 7.2
- EPSS exploit prediction: 1% (50th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Mitel 6873i Sip Firmware
- Published:
- Last 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.
Frequently asked questions
- What is CVE-2022-29855?
- 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.
- How severe is CVE-2022-29855?
- CVE-2022-29855 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2022-29855 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-29855?
- CVE-2022-29855 primarily affects Mitel 6873i Sip Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2022-29855?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2022-29855 published?
- CVE-2022-29855 was published on 2022-05-11 and last updated on 2026-06-17.
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
Affected products (9)
- cpe:2.3:o:mitel:6873i_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6930_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6940_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6865i_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6867i_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6869i_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6920_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6910_sip_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitel:6905_sip_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Mitel 6873i Sip Firmware
- CVE-2020-27639 — High (CVSS 8.1): The Bluetooth handset of Mitel MiVoice 6873i, 6930, and 6940 SIP phones with firmware before 5.1.0.SP6 could allow an…
- CVE-2024-41710 — High (CVSS 7.2): A vulnerability in the Mitel 6800 Series, 6900 Series, and 6900w Series SIP Phones, including the 6970 Conference Unit,…