CVE-2020-3387

Name: CVE-2020-3387
Creator: NVD / NIST
Published: 2020-07-16T18:15:19.127+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 14.07%

Last modified Jun 17, 2026

CVE-2020-3387 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 14.07% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

14.07%

96.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Sd-Wan Firmware	<= 18.3.0
Cisco	Sd-Wan Firmware	>= 18.4.0, < 19.2.3
Cisco	Sd-Wan Firmware	>= 19.3.0, < 20.1.1.1

References

http://packetstormsecurity.com/files/162958/Cisco-SD-WAN-vManage-19.2.2-Remote-Root.htmlExploit, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanrce-4jtWT28PVendor Advisory
http://packetstormsecurity.com/files/162958/Cisco-SD-WAN-vManage-19.2.2-Remote-Root.htmlExploit, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanrce-4jtWT28PVendor Advisory

Timeline

Published: Jul 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3387?

How severe is CVE-2020-3387?

CVE-2020-3387 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 14.07% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3387?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3387?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST