CVE-2018-0203

Name: CVE-2018-0203
Creator: NVD / NIST
Published: 2018-02-22T00:29:00.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.65%

Last modified Jun 17, 2026

CVE-2018-0203 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.65% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.65%

73.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-19

Affected Software

Vendor	Product	Versions
Cisco	Unity Connection	All versions

References

http://www.securityfocus.com/bid/103142Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040413Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180221-cucVendor Advisory
http://www.securityfocus.com/bid/103142Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040413Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180221-cucVendor Advisory

Timeline

Published: Feb 22, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0203?

How severe is CVE-2018-0203?

Severity scoring for CVE-2018-0203 is pending analysis. The EPSS model estimates a 1.65% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0203?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0203?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST