Vulnerability record · CVE-2022-20817 · published 15 June 2022
CVE-2022-20817: Cisco unified ip phone 6911 firmware vulnerability
Cisco · Unified Ip Phone 6911 Firmware
A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.
Description
A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
Ata 187 Analog Telephone Adapter Firmware Cisco
Unified Ip Phone 6911 Firmware Cisco
Unified Ip Phone 6921 Firmware Cisco
Unified Ip Phone 6941 Firmware Cisco
Unified Ip Phone 6945 Firmware Cisco
Unified Ip Phone 6961 Firmware Cisco
Unified Ip Phone 8941 Firmware Cisco
Unified Ip Phone 8945 Firmware Cisco
Unified Ip Phone 8961 Firmware Cisco
Unified Ip Phone 9951 Firmware Cisco
Unified Ip Phone 9971 Firmware Cisco
References
Track CVE-2022-20817 inside VULONE
Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.
Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
Source: NIST National Vulnerability Database (record CVE-2022-20817), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.
