CVE-2021-34730 — CRITICAL (9.8)

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cisco	Application Extension Platform	1.0.3.55
Cisco	Rv110W Wireless-N Vpn Firewall Firmware	-
Cisco	Rv110W Wireless-N Vpn Firewall	-
Cisco	Rv130 Vpn Router Firmware	-
Cisco	Rv130 Vpn Router	-
Cisco	Rv130W Wireless-N Multifunction Vpn Router Firmware	-
Cisco	Rv130W Wireless-N Multifunction Vpn Router	-
Cisco	Rv215W Wireless-N Vpn Router Firmware	-
Cisco	Rv215W Wireless-N Vpn Router	-

Related Weaknesses (CWE)

CWE-121 CWE-787

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cVendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cVendor Advisory

FAQ

What is CVE-2021-34730?

CVE-2021-34730 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 cod...

How severe is CVE-2021-34730?

CVE-2021-34730 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-34730?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Application Extension Platform, Cisco Rv110W Wireless-N Vpn Firewall Firmware, Cisco Rv110W Wireless-N Vpn Firewall, Cisco Rv130 Vpn Router Firmware, Cisco Rv130 Vpn Router.