peter bassill · operator
$ cve CVE-2021-34730 JSON

CVE-2021-34730

9.8
CRITICAL · CVSS 3.1 · EPSS 18.5% (pctl 97)

Patch early

EPSS 18.5% — above the 10% action threshold.

Description

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.

Scoring

CVSS9.8 (CRITICAL, v3.1)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS18.5% — more likely to be exploited than 97% of all CVEs
WeaknessCWE-121
On CISA KEVno
Public exploitnone known
Published2021-08-18
Last modified2026-06-17

Affected (9)

VendorProduct
ciscoapplication extension platform
ciscorv110w wireless-n vpn firewall
ciscorv110w wireless-n vpn firewall firmware
ciscorv130 vpn router
ciscorv130 vpn router firmware
ciscorv130w wireless-n multifunction vpn router
ciscorv130w wireless-n multifunction vpn router firmware
ciscorv215w wireless-n vpn router
ciscorv215w wireless-n vpn router firmware

References

→ the Explorer  ·  watch your stack  ·  NVD