CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2020-3161
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.
Severity
- EPSS
- 84% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CISA KEV
- listed 2021-11-03, due 2022-05-03
- CWE
- CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Affected
- cisco:8831_firmware
- cisco:ip_phone_7811_firmware
- cisco:ip_phone_7821_firmware
- cisco:ip_phone_7841_firmware
- cisco:ip_phone_7861_firmware
- cisco:ip_phone_8811_firmware
- cisco:ip_phone_8821-ex_firmware
- cisco:ip_phone_8821_firmware
- cisco:ip_phone_8841_firmware
- cisco:ip_phone_8845_firmware
- cisco:ip_phone_8851_firmware
- cisco:ip_phone_8861_firmware
- cisco:ip_phone_8865_firmware
References
- http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs
- http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3161