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CVE-2020-3161

Known Exploited (CISA KEV)CRITICAL
9.8
CVSS Severity Score
EPSS Score77.3520%
EPSS Percentile95.57th
PublishedApr 15, 2020
Last ModifiedOct 28, 2025

Vulnerability Description

A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.

Affected Platforms (CPE)

πŸ’»
Cisco

Ip Phone 8865 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8865 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8865 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 8851 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8851 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8851 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 7841 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 7821 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8811 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8811 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8811 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 8861 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8861 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8861 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 8845 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8845 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8845 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 7861 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8841 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8841 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8841 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 7811 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8821 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8821 Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8821 Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

Ip Phone 8821 Ex Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

Ip Phone 8821 Ex Firmware

= 11.0\(1\)
πŸ’»
Cisco

Ip Phone 8821 Ex Firmware

= 11.0\(5\)sr1
πŸ’»
Cisco

8831 Firmware

= 10.3\(1\)es14
πŸ’»
Cisco

8831 Firmware

= 11.0\(1\)
πŸ’»
Cisco

8831 Firmware

= 11.0\(5\)sr1

References & Advisories

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