CVE-2020-3372: Cisco SD-WAN vManage Software Denial of Service Vulnerability

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-16 · updated 2026-06-17
Weakness: CWE-400

Description

A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to consume excessive system memory and cause a denial of service (DoS) condition on an affected system. The vulnerability is due to inefficient memory management. An attacker could exploit this vulnerability by sending a large number of crafted HTTP requests to the affected web-based management interface. A successful exploit could allow the attacker to exhaust system memory, which could cause the system to stop processing new connections and could result in a DoS condition.

Affected products

Cisco SD-WAN vManage: before 19.2.3; from 20.1.0 before 20.1.12 — fixed in 19.2.3, 20.1.12

How to fix

Upgrade to a fixed version: Cisco SD-WAN vManage 19.2.3, 20.1.12. Check the vendor advisory for mitigations.

References

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