CVE-2024-20496

Cisco SD-WAN vEdge Routers Denial of Service Vulnerability

Published Sep 25, 2024 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed

Description

A vulnerability in the UDP packet validation code of Cisco SD-WAN vEdge Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected system.

This vulnerability is due to incorrect handling of a specific type of malformed UDP packet. An attacker in a machine-in-the-middle position could exploit this vulnerability by sending crafted UDP packets to an affected device. A successful exploit could allow the attacker to cause the device to reboot, resulting in a DoS condition on the affected system.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco SD-WAN vEdge Cloud

unknown

Version	Status	Constraints
`19.2.1`	affected	—
`20.1.12`	affected	—
`18.4.4`	affected	—
`19.3.0`	affected	—
`18.3.8`	affected	—
`19.2.2`	affected	—
`20.1.1`	affected	—
`18.3.6`	affected	—
`18.4.3`	affected	—
`18.4.302`	affected	—
`18.4.5`	affected	—
`18.4.303`	affected	—
`19.2.098`	affected	—
`19.1.0`	affected	—
`19.0.1a`	affected	—
`19.2.099`	affected	—
`18.3.7`	affected	—
`19.2.097`	affected	—
`18.3.1`	affected	—
`19.2.0`	affected	—
`18.3.4`	affected	—
`18.2.0`	affected	—
`18.4.1`	affected	—
`18.4.0`	affected	—
`18.3.5`	affected	—
`18.3.3`	affected	—
`18.3.0`	affected	—
`19.2.3`	affected	—
`20.3.1`	affected	—
`20.1.2`	affected	—
`19.2.929`	affected	—
`19.2.31`	affected	—
`20.3.2`	affected	—
`19.2.32`	affected	—
`18.4.6`	affected	—
`20.4.1`	affected	—
`19.2.4`	affected	—
`20.4.1.1`	affected	—
`20.3.3`	affected	—
`20.5.1`	affected	—
`20.1.3`	affected	—
`20.4.1.2`	affected	—
`20.4.2`	affected	—
`20.3.4`	affected	—
`20.6.1`	affected	—
`20.6.2`	affected	—
`20.7.1`	affected	—
`20.3.5`	affected	—
`20.6.3`	affected	—
`20.8.1`	affected	—
`20.7.2`	affected	—
`20.6.4`	affected	—
`20.9.1`	affected	—
`20.3.6`	affected	—
`20.9.1.1`	affected	—
`20.9.2`	affected	—
`20.6.5`	affected	—
`20.3.7`	affected	—
`20.9.3`	affected	—
`20.4.2.3`	affected	—
`20.3.4.3`	affected	—
`20.6.4.1`	affected	—
`20.6.3.2`	affected	—
`20.3.5.1`	affected	—
`20.9.3.1`	affected	—
`20.6.5.2`	affected	—
`20.3.7.1`	affected	—
`20.3.3.2`	affected	—
`20.6.1.2`	affected	—
`20.1.3.1`	affected	—
`20.9.2.2`	affected	—
`20.6.5.3`	affected	—
`20.6.3.3`	affected	—
`20.3.7.2`	affected	—
`20.6.5.4`	affected	—
`20.9.2.3`	affected	—
`20.3.8`	affected	—

Cisco

Cisco SD-WAN vEdge router

unknown

Version	Status	Constraints
`18.4.303`	affected	—
`18.3.7`	affected	—
`19.3.0`	affected	—
`18.2.0`	affected	—
`20.1.12`	affected	—
`19.2.099`	affected	—
`18.3.3`	affected	—
`18.3.6`	affected	—
`19.0.0`	affected	—
`18.4.0`	affected	—
`19.1.01`	affected	—
`19.2.098`	affected	—
`18.3.1`	affected	—
`18.4.302`	affected	—
`19.2.2`	affected	—
`18.3.5`	affected	—
`19.1.0`	affected	—
`20.1.11`	affected	—
`19.2.097`	affected	—
`18.4.5`	affected	—
`18.3.8`	affected	—
`18.3.0`	affected	—
`18.4.3`	affected	—
`18.4.4`	affected	—
`19.2.1`	affected	—
`18.3.4`	affected	—
`19.0.1a`	affected	—
`20.1.1`	affected	—
`18.4.1`	affected	—
`19.2.0`	affected	—
`19.2.3`	affected	—
`20.3.1`	affected	—
`20.1.2`	affected	—
`19.2.929`	affected	—
`19.2.31`	affected	—
`20.3.2`	affected	—
`19.2.32`	affected	—
`18.4.6`	affected	—
`20.4.1`	affected	—
`19.2.4`	affected	—
`20.4.1.1`	affected	—
`20.3.3`	affected	—
`20.5.1`	affected	—
`20.1.3`	affected	—
`20.4.1.2`	affected	—
`20.4.2`	affected	—
`20.3.4`	affected	—
`20.6.1`	affected	—
`20.6.2`	affected	—
`20.7.1`	affected	—
`20.7.1.2`	affected	—
`20.3.5`	affected	—
`20.9.1`	affected	—
`20.6.3`	affected	—
`20.8.1`	affected	—
`20.7.2`	affected	—
`20.6.4`	affected	—
`20.3.6`	affected	—
`20.9.2`	affected	—
`20.6.5`	affected	—
`20.3.7`	affected	—
`20.9.3`	affected	—
`20.6.5.1`	affected	—
`20.3.3.2`	affected	—
`20.6.4.1`	affected	—
`20.6.3.2`	affected	—
`20.3.4.3`	affected	—
`20.6.5.2`	affected	—
`20.9.3.1`	affected	—
`20.3.7.1`	affected	—
`20.3.5.1`	affected	—
`20.4.2.3`	affected	—
`20.6.1.2`	affected	—
`20.9.2.2`	affected	—
`20.1.3.1`	affected	—
`20.6.5.3`	affected	—
`20.6.3.3`	affected	—
`20.3.7.2`	affected	—
`20.6.5.4`	affected	—
`20.9.2.3`	affected	—
`20.3.8`	affected	—

No data.

Vendor	Product	Versions
Cisco	Sd-wan Vedge Cloud	—
Cisco	Sd-wan Vedge Router	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2024-18211	A vulnerability in the UDP packet validation code of Cisco SD-WAN vEdge Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to incorrect handling of a specific type of malformed UDP packet. An attacker in a machine-in-the-middle position could exploit this vulnerability by sending crafted UDP packets to an affected device. A successful exploit could allow the attacker to cause the device to reboot, resulting in a DoS condition on the affected system.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.225% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-vedos-KqFfhps3

History

Jul 12, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00047}`	epss `{'score': 0.00044}`

Sep 25, 2024 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 25, 2024 4:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		A vulnerability in the UDP packet validation code of Cisco SD-WAN vEdge Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to incorrect handling of a specific type of malformed UDP packet. An attacker in a machine-in-the-middle position could exploit this vulnerability by sending crafted UDP packets to an affected device. A successful exploit could allow the attacker to cause the device to reboot, resulting in a DoS condition on the affected system.
Title		Cisco SD-WAN vEdge Routers Denial of Service Vulnerability
Weaknesses		CWE-787
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-vedos-KqFfhps3
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H'}`