CVE-2020-3161

CRITICALCISA KEV

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/15/2020

Last Modified10/28/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorCisco

ProductCisco IP Phones

Vulnerability NameCisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability

KEV Date Added2021-11-03

Remediation Due Date2022-05-03

Ransomware UseUnknown

Affected Products

cisco:8831cisco:8831_firmwarecisco:ip_phone_7811cisco:ip_phone_7811_firmwarecisco:ip_phone_7821cisco:ip_phone_7821_firmwarecisco:ip_phone_7841cisco:ip_phone_7841_firmwarecisco:ip_phone_7861cisco:ip_phone_7861_firmwarecisco:ip_phone_8811cisco:ip_phone_8811_firmwarecisco:ip_phone_8821cisco:ip_phone_8821-excisco:ip_phone_8821-ex_firmwarecisco:ip_phone_8821_firmwarecisco:ip_phone_8841cisco:ip_phone_8841_firmwarecisco:ip_phone_8845cisco:ip_phone_8845_firmwarecisco:ip_phone_8851cisco:ip_phone_8851_firmwarecisco:ip_phone_8861cisco:ip_phone_8861_firmwarecisco:ip_phone_8865cisco:ip_phone_8865_firmware

Weaknesses (CWE)

CWE-20CWE-20

References

http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html(psirt@cisco.com)

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs(psirt@cisco.com)

http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html(af854a3a-2127-422b-91ae-364da2661108)

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3161(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.