High severity8.6NVD Advisory· Published Jul 16, 2020· Updated Jun 17, 2026

CVE-2020-3351

Description

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper validation of fields in Cisco SD-WAN peering messages that are encapsulated in UDP packets. An attacker could exploit this vulnerability by sending crafted UDP messages to the targeted system. A successful exploit could allow the attacker to cause services on the device to fail, resulting in a DoS condition that could impact the targeted device and other devices that depend on it.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Sd Wan Firmware
cpe:2.3:o:cisco:sd-wan_firmware:*:*:*:*:*:*:*:*
Range: <17.2.7
Cisco Systems, Inc./Vedge Cloud Router
cpe:2.3:a:cisco:vedge_cloud_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./Vsmart Controller
cpe:2.3:a:cisco:vsmart_controller:-:*:*:*:*:*:*:*
Cisco Systems, Inc./Cisco SD-WAN Solution softwarellm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)range: n/a

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-dos-KWOdyHnBnvdVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.559
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000