CVE-2025-20335
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 un…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Desk Phone 9841 Firmware | from 3.0\(1\) before 3.3\(1\) |
| Cisco | Desk Phone 9851 Firmware | from 3.0\(1\) before 3.3\(1\) |
| Cisco | Desk Phone 9861 Firmware | from 3.0\(1\) before 3.3\(1\) |
| Cisco | Desk Phone 9871 Firmware | from 3.0\(1\) before 3.3\(1\) |
| Cisco | Ip Phone 7811 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 7821 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 7841 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 7861 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 8811 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 8841 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 8845 Firmware | before 14.3\(1\) Version 14.3\(1\) |
| Cisco | Ip Phone 8851 Firmware | before 14.3\(1\) Version 14.3\(1\) |