CVE-2025-20336
Last modified
CVE-2025-20336 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Desk Phone 9841 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9851 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9861 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Desk Phone 9871 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Ip Phone 8841 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8841 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 7811 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7811 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 7821 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7821 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 7841 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7841 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 7861 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 7861 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 8811 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8811 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 8845 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8845 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 8851 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8851 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 8851nr Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8851nr Firmware | 14.3\(1\) |
| Cisco | Ip Phone 8861 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8861 Firmware | 14.3\(1\) |
| Cisco | Ip Phone 8865 Firmware | < 14.3\(1\) |
| Cisco | Ip Phone 8865 Firmware | 14.3\(1\) |
| Cisco | Video Phone 8875 Firmware | < 2.3\(1\) |
| Cisco | Video Phone 8875 Firmware | >= 3.0\(1\), < 3.3\(1\) |
| Cisco | Video Phone 8875 Firmware | 2.3\(1\) |
| Cisco | Ip Phone 8821 Firmware | < 11.0\(6\) |
| Cisco | Ip Phone 8821 Firmware | 11.0\(6\) |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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