CVE-2020-3375: A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. Th...

Description

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access, make changes to the system that they are not authorized to make, and execute commands on an affected system with privileges of the root user.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.87%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Sd-Wan	<= 18.3.0
Cisco	Sd-Wan	>= 18.4.0, < 18.4.5
Cisco	Sd-Wan	>= 19.2.0, < 19.2.2
Cisco	Sd-Wan	>= 19.3.0, < 20.1.1
Cisco	Ios Xe Sd-Wan	<= 16.9.0
Cisco	Ios Xe Sd-Wan	>= 16.12.0, <= 16.12.4
Cisco	Ios Xe Sd-Wan	>= 17.2.0, <= 17.2.1

References

Timeline

Published: Jul 31, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3375?

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access, make changes to the system that they are not authorized to make, and execute commands on an affected system with privileges of the root user.

How severe is CVE-2020-3375?

CVE-2020-3375 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.87% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3375?

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.