CVE-2025-20336

moderate-risk
Published 2025-09-03

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Desk Phone 9841 Firmware
Desk Phone 9851 Firmware
Desk Phone 9861 Firmware
Desk Phone 9871 Firmware
Ip Phone 7811 Firmware
Ip Phone 7811 Firmware
Ip Phone 7811 Firmware
Ip Phone 7821 Firmware
Ip Phone 7821 Firmware
Ip Phone 7821 Firmware
Ip Phone 7841 Firmware
Ip Phone 7841 Firmware
Ip Phone 7841 Firmware
Ip Phone 7861 Firmware
Ip Phone 7861 Firmware
Ip Phone 7861 Firmware

Affected Vendors

46
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 25/34 · High