CVE-2022-20774: Cisco IP Phone 6825 Firmware

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against a user of the web-based interface of an affected system. This vulnerability is due to insufficient CSRF protections for the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading an authenticated user of the interface to follow a crafted link. A successful exploit could allow the attacker to perform configuration changes on the affected device, resulting in a denial of service (DoS) condition.

Affected products

• Cisco IP Phone 6825 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 6841 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 6851 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 6861 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 6871 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 7811 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 7821 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 7832 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 7841 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 7861 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8811 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8832 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8841 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8845 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8851 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8861 Firmware: before 11.3.5 (fixed in 11.3.5)
• Cisco IP Phone 8865 Firmware: before 11.3.5 (fixed in 11.3.5)

Published 2022-04-06. Last modified 2026-06-17.