Patchfirst
CVE-2021-34730 Public exploit Critical · 9.8 EPSS 18.5%

Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Remote Command Execution and Denial of Service…

Cisco · Cisco Small Business RV Series Router Firmware

Summary

A flaw in the Universal Plug-and-Play (UPnP) service of the Cisco Small Business RV Series Router Firmware, affecting the RV110W, RV130, RV130W, and RV215W routers, stems from improper validation of incoming UPnP traffic. An unauthenticated remote attacker who sends a crafted UPnP request to an affected device, with no user interaction required, can execute arbitrary code as root or cause the device to reload, resulting in a denial of service.

Official description · CVE.org

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.

Breakdown
76.3 / 100
Exploited
Yes, in VulnCheck KEV
Reports
0
Tactics
0/15

First seen exploited 10 months after disclosure. Public exploit code (PoC-in-GitHub) appeared 43 days after disclosure.

  1. Disclosedday 0
  2. Public exploit codePoC-in-GitHub+43 days
  3. First seen exploitedVulnCheck KEV evidence+10 mo

techniques

No techniques linked

No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.

What security researchers reported

Not named in any threat report yet

References

1 link, grouped by NVD tag
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