CVE-2021-1157: Cisco Application Extension Platform

Medium severity, CVSS 4.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface. The vulnerabilities are due to insufficient input validation by the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.

Affected products

• Cisco Application Extension Platform: version 1.0.3.55 only
• Cisco RV110W Firmware: version 1.2.2.8 only; version 1.3.1.7 only
• Cisco RV130 VPN Router Firmware: version 1.2.2.8 only; version 1.3.1.7 only
• Cisco RV130W Firmware: version 1.2.2.8 only; version 1.3.1.7 only
• Cisco RV215W Wireless-N VPN Router Firmware: version 1.2.2.8 only; version 1.3.1.7 only

Published 2021-01-13. Last modified 2026-06-17.