← Vulnerability feed

Vulnerability record · CVE-2020-3387 · published 16 July 2020

CVE-2020-3387: Cisco sd-wan firmware improper input validation vulnerability

Cisco · Sd Wan Firmware

A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to execute code with root privileges on an affected system. The vulnerability is due to insufficient input sanitization during user authentication processing. An attacker could exploit this vulnerability by sending a crafted response to the Cisco SD-WAN vManage Software. A successful exploit could allow the attacker to access the software and execute commands they should not be authorized to execute.

8.8 CVSS 3.1 High EPSS 13% · top 3.8% CWE-20 · Improper input validation
8.8CVSS 3.1 base score, v2 9.0
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to execute code with root privileges on an affected system. The vulnerability is due to insufficient input sanitization during user authentication processing. An attacker could exploit this vulnerability by sending a crafted response to the Cisco SD-WAN vManage Software. A successful exploit could allow the attacker to access the software and execute commands they should not be authorized to execute.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/162958/Cisco-SD-WAN-vManage-19.2.2-Remote-Root.html ExploitThird Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanrce-4jtWT28P Vendor Advisory
http://packetstormsecurity.com/files/162958/Cisco-SD-WAN-vManage-19.2.2-Remote-Root.html ExploitThird Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanrce-4jtWT28P Vendor Advisory

Track CVE-2020-3387 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-1300Cisco ios xe sd-wan memory buffer overflow vulnerabilityMultiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute attacks against an affected device. For …EPSS 2.1%9.8CVE-2021-1301Cisco ios xe sd-wan memory buffer overflow vulnerabilityMultiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute attacks against an affected device. For …EPSS 2.1%8.8CVE-2021-1298Cisco sd-wan firmware improper input validation vulnerabilityMultiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection attacks against an affected devi…EPSS 2.4%8.8CVE-2021-1299Cisco sd-wan firmware improper input validation vulnerabilityMultiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection attacks against an affected devi…EPSS 2.4%8.8CVE-2020-3381Cisco sd-wan firmware path traversal vulnerabilityA vulnerability in the web management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to conduct directory t…EPSS 2.6%8.8CVE-2020-3115Cisco sd-wan firmware permissions and access controls vulnerabilityA vulnerability in the CLI of the Cisco SD-WAN Solution vManage software could allow an authenticated, local attacker to elevate privileges to root-l…EPSS 0.33%8.8CVE-2019-1626Cisco sd-wan firmware permissions and access controls vulnerabilityA vulnerability in the vManage web-based UI (Web UI) of the Cisco SD-WAN Solution could allow an authenticated, remote attacker to gain elevated priv…EPSS 1.9%8.6CVE-2021-1279Cisco ios xe sd-wan memory buffer overflow vulnerabilityMultiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against …EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2020-3387), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.