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Vulnerability record · CVE-2021-1298 · published 20 January 2021

CVE-2021-1298: Cisco sd-wan firmware improper input validation vulnerability

Cisco · Sd Wan Firmware

Multiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection attacks against an affected device, which could allow the attacker to take certain actions with root privileges on the device. For more information about these vulnerabilities, see the Details section of this advisory.

8.8 CVSS 3.1 High EPSS 2.4% · top 16.8% CWE-20 · Improper input validationCWE-77 · Command injection
8.8CVSS 3.1 base score, v2 9.0
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Multiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection attacks against an affected device, which could allow the attacker to take certain actions with root privileges on the device. For more information about these vulnerabilities, see the Details section of this advisory.

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

Affected products

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

References

LinkTags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-cmdinjm-9QMSmgcn Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-cmdinjm-9QMSmgcn Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2021-1298), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.