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 access sensitive information on an affected device. This vulnerability exists because the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. An attacker could exploit this vulnerability by sending a crafted packet to the IP address of a device that has Web Access enabled. A successful exploit could allow the attacker to access sensitive information from the device. Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Desk Phone 9841 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9841 | - |
| Cisco | Desk Phone 9851 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9851 | - |
| Cisco | Desk Phone 9861 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9861 | - |
| Cisco | Desk Phone 9871 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9871 | - |
| Cisco | Ip Phone 8841 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8841 | - |
| Cisco | Ip Phone 7811 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7811 | - |
| Cisco | Ip Phone 7821 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7821 | - |
| Cisco | Ip Phone 7841 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7841 | - |
| Cisco | Ip Phone 7861 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7861 | - |
| Cisco | Ip Phone 8811 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8811 | - |
Related Weaknesses (CWE)
References
FAQ
What is CVE-2025-20336?
CVE-2025-20336 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 access ...
How severe is CVE-2025-20336?
CVE-2025-20336 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-20336?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Desk Phone 9841 Firmware, Cisco Desk Phone 9841, Cisco Desk Phone 9851 Firmware, Cisco Desk Phone 9851, Cisco Desk Phone 9861 Firmware.