CVE-2022-20660: Cisco IP Phones Information Disclosure Vulnerability

Severity: medium (CVSS 4.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-14 · updated 2026-06-17
Weakness: CWE-312

Description

A vulnerability in the information storage architecture of several Cisco IP Phone models could allow an unauthenticated, physical attacker to obtain confidential information from an affected device. This vulnerability is due to unencrypted storage of confidential information on an affected device. An attacker could exploit this vulnerability by physically extracting and accessing one of the flash memory chips. A successful exploit could allow the attacker to obtain confidential information from the device, which could be used for subsequent attacks.

Affected products

Cisco Ip Conference Phone 7832 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Conference Phone 8832 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 7811 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 7821 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 7841 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 7861 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 8811 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 8841 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 8845 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 8851 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 8861 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Ip Phone 8865 Firmware: before 14.1\(1\) — fixed in 14.1\(1\)
Cisco Unified Ip Conference Phone 8831 Firmware: all versions
Cisco Unified Ip Conference Phone 8831 For Third-Party Call Control Firmware: all versions
Cisco Unified Ip Phone 7945G Firmware: all versions
Cisco Unified Ip Phone 7965G Firmware: all versions
Cisco Unified Ip Phone 7975G Firmware: all versions
Cisco Unified Sip Phone 3905 Firmware: before 9.4\(1\)sr5 — fixed in 9.4\(1\)sr5
Cisco Wireless Ip Phone 8821-Ex Firmware: before 11.0\(6\)sr2 — fixed in 11.0\(6\)sr2
Cisco Wireless Ip Phone 8821 Firmware: before 11.0\(6\)sr2 — fixed in 11.0\(6\)sr2

How to fix

Upgrade to a fixed version: Cisco Ip Conference Phone 7832 Firmware 14.1\(1\); Cisco Ip Conference Phone 8832 Firmware 14.1\(1\); Cisco Ip Phone 7811 Firmware 14.1\(1\); Cisco Ip Phone 7821 Firmware 14.1\(1\); Cisco Ip Phone 7841 Firmware 14.1\(1\); Cisco Ip Phone 7861 Firmware 14.1\(1\); Cisco Ip Phone 8811 Firmware 14.1\(1\); Cisco Ip Phone 8841 Firmware 14.1\(1\); Cisco Ip Phone 8845 Firmware 14.1\(1\); Cisco Ip Phone 8851 Firmware 14.1\(1\); Cisco Ip Phone 8861 Firmware 14.1\(1\); Cisco Ip Phone 8865 Firmware 14.1\(1\). Check the vendor advisory for mitigations.

References

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