CVE-2023-20218: Cisco SPA500DS Firmware

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in web-based management interface of Cisco SPA500 Series Analog Telephone Adapters (ATAs) could allow an authenticated, remote attacker to to modify a web page in the context of a user's browser. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected software. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to alter the contents of a web page to redirect the user to potentially malicious websites, or the attacker could use this vulnerability to conduct further client-side attacks. Cisco will not release software updates that address this vulnerability. {{value}} ["%7b%7bvalue%7d%7d"])}]]

Affected products

• Cisco SPA500DS Firmware: affected versions not specified
• Cisco SPA500S Firmware: affected versions not specified
• Cisco SPA501G Firmware: affected versions not specified
• Cisco SPA502G Firmware: affected versions not specified
• Cisco SPA504G Firmware: affected versions not specified
• Cisco SPA508G Firmware: affected versions not specified
• Cisco SPA509G Firmware: affected versions not specified
• Cisco SPA512G Firmware: affected versions not specified
• Cisco SPA514G Firmware: affected versions not specified
• Cisco SPA525 Firmware: affected versions not specified
• Cisco SPA525G2 Firmware: affected versions not specified
• Cisco SPA525G Firmware: affected versions not specified

Published 2023-08-03. Last modified 2026-06-17.