---
id: CVE-2021-1279
title: Cisco SD-WAN Denial of Service Vulnerabilties
summary: "Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device.\r\n\r\nFor more information about these vulnerabilities, see the Details […"
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: vendor
vendor: Cisco
product: Cisco Catalyst SD-WAN Manager
affected:
  - catalyst_sd_wan_manager
  - sd_wan_vedge_router
  - sd_wan_vcontainer
  - catalyst_sd_wan
  - sd_wan_vedge_cloud
published: '2021-01-20'
updated: '2021-02-02'
sourceUpdated: '2021-02-02T22:21:54+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-dosmulti-48jJuEUP
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-dosmulti-48jJuEUP
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.01385
epssPercentile: 0.71002
ingestedAt: '2026-09-25T07:41:37.795Z'
---

## Overview

Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device.

For more information about these vulnerabilities, see the Details ["#details"] section of this advisory.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

## Vendor advisories

- **cisco-sa-sdwan-dosmulti-48jJuEUP** · Cisco · affected: Cisco Catalyst SD-WAN Manager, Cisco SD-WAN vEdge Router, Cisco SD-WAN vContainer, Cisco Catalyst SD-WAN, Cisco SD-WAN vEdge Cloud · updated 2021-02-02 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-dosmulti-48jJuEUP)

**Cisco SD-WAN Denial of Service Vulnerabilities**. Released 2021-01-20, updated 2021-02-02.

Affected:

- Cisco Catalyst SD-WAN Manager
- Cisco SD-WAN vEdge Router
- Cisco SD-WAN vContainer
- Cisco Catalyst SD-WAN
- Cisco SD-WAN vEdge Cloud

## Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com