CVE-2021-34730

The record

A vulnerability in the Universal Plug-and-Play (UPnP) service of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of incoming UPnP traffic. An attacker could exploit this vulnerability by sending a crafted UPnP request to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a DoS condition. Cisco has not released software updates that address this vulnerability.

Affected packages

Related vulnerabilities

• CVE-2026-111497 A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli… CWE-787
• CVE-2026-112397 Pillow is a Python imaging library. CWE-787
• CVE-2026-112059 libLAS through 1.8.1 contains a heap out-of-bounds write vulnerability in the point… CWE-787
• CVE-2026-89088 A flaw was found in parted. CWE-787
• CVE-2026-89085 A flaw was found in parted. CWE-787
• CVE-2026-85746 MariaDB server is a community developed fork of MySQL server. CWE-787
• CVE-2026-107815 MariaDB server is a community developed fork of MySQL server. CWE-787
• CVE-2026-56851 The Nickname profile can panic with an out-of-bounds slice error when transforming… CWE-787