CVE-2017-12271: Cisco SPA300 Firmware

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability in Cisco SPA300 and SPA500 Series IP Phones could allow an unauthenticated, remote attacker to execute unwanted actions on an affected device. The vulnerability is due to a lack of cross-site request forgery (CSRF) protection. An attacker could exploit this vulnerability by tricking the user of a web application into executing an adverse action. Cisco Bug IDs: CSCuz88421, CSCuz91356, CSCve56308.

Affected products

• Cisco SPA300 Firmware: up to and including 7.5.5
• Cisco SPA500 Firmware: up to and including 7.5.5

Published 2017-10-19. Last modified 2026-06-17.