What’s Vulnerable › Vulnerabilities
CVE-2025-20158: Cisco Video Phone 8875 and Desk Phone 9800 Series Information Disclosure Vulnerability
- Severity: medium (CVSS 4.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-02-19 · updated 2026-06-17
- Weakness: CWE-200
Description
A vulnerability in the debug shell of Cisco Video Phone 8875 and Cisco Desk Phone 9800 Series could allow an authenticated, local attacker to access sensitive information on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials with SSH access on the affected device. SSH access is disabled by default. This vulnerability is due to insufficient validation of user-supplied input by the debug shell of an affected device. An attacker could exploit this vulnerability by sending a crafted SSH client command to the CLI. A successful exploit could allow the attacker to access sensitive information on the underlying operating system.
Affected products
- Cisco Desk Phone 9841 Firmware: before 3.3\(1\) — fixed in 3.3\(1\)
- Cisco Desk Phone 9851 Firmware: before 3.3\(1\) — fixed in 3.3\(1\)
- Cisco Desk Phone 9861 Firmware: before 3.3\(1\) — fixed in 3.3\(1\)
- Cisco Desk Phone 9871 Firmware: before 3.3\(1\) — fixed in 3.3\(1\)
- Cisco Video Phone 8875 Firmware: before 3.3\(1\) — fixed in 3.3\(1\)
How to fix
Upgrade to a fixed version: Cisco Desk Phone 9841 Firmware 3.3\(1\); Cisco Desk Phone 9851 Firmware 3.3\(1\); Cisco Desk Phone 9861 Firmware 3.3\(1\); Cisco Desk Phone 9871 Firmware 3.3\(1\); Cisco Video Phone 8875 Firmware 3.3\(1\). Check the vendor advisory for mitigations.
References
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