CVE-2025-20335

Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Information Arbitrary File Write Vulnerability

Description

A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to write arbitrary files on an affected device. This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system. Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.

INFO

Published Date :

2025-09-03T17:41:06.201Z

Last Modified :

2025-09-03T17:56:55.586Z

Source :

cisco

AFFECTED PRODUCTS

The following products are affected by CVE-2025-20335 vulnerability.

Vendors	Products
Cisco	Desk Phone 9841 Desk Phone 9841 Firmware Desk Phone 9851 Desk Phone 9851 Firmware Desk Phone 9861 Desk Phone 9861 Firmware Desk Phone 9871 Desk Phone 9871 Firmware Ip Phone 7800 Ip Phone 7811 Ip Phone 7811 Firmware Ip Phone 7821 Ip Phone 7821 Firmware Ip Phone 7841 Ip Phone 7841 Firmware Ip Phone 7861 Ip Phone 7861 Firmware Ip Phone 8800 Ip Phone 8811 Ip Phone 8811 Firmware Ip Phone 8821 Ip Phone 8821 Firmware Ip Phone 8841 Ip Phone 8841 Firmware Ip Phone 8845 Ip Phone 8845 Firmware Ip Phone 8851 Ip Phone 8851 Firmware Ip Phone 8851nr Ip Phone 8851nr Firmware Ip Phone 8861 Ip Phone 8861 Firmware Ip Phone 8865 Ip Phone 8865 Firmware Ip Phone 9800 Session Initiation Protocol \(sip\) Firmware Video Phone 8875 Video Phone 8875 Firmware

Vendors

Products

Cisco