What is CVE-2018-0355?

CVE-2018-0355 is a medium-severity vulnerability in Cisco Unified Communications Manager, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2018-06-07.

How severe is CVE-2018-0355?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Improper input validation in Cisco Unified Communications Manager

CVE-2018-0355

A vulnerability in the web UI of Cisco Unified Communications Manager (Unified CM) could allow an unauthenticated, remote attacker to conduct a cross-frame scripting (XFS) attack against the user of the web UI of an affected system. The vulnerability is due to insufficient protections for HTML inline frames (iframes) by the web UI of the affected software. An attacker could exploit this vulnerability by persuading a user of the affected UI to navigate to an attacker-controlled web page that contains a malicious HTML iframe. A successful exploit could allow the attacker to conduct click-jacking or other client-side browser attacks on the affected system. Cisco Bug IDs: CSCvg19761.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.018 (77.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Cisco Unified Communications Manager — versions 12.0\(1.10000.10\), 10.5(2.10000.5), 10.5\(2.10000.5\)
Cisco Unified Communications Manager Unknown — versions Cisco Unified Communications Manager unknown

Weakness classification (CWE)

References

www.securityfocus.com/bid/104425 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1041068 (VDB Entry, Third Party Advisory, vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-0355?: CVE-2018-0355 is a medium-severity vulnerability in Cisco Unified Communications Manager, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2018-06-07.
How severe is CVE-2018-0355?: Medium severity. CVSS v3 base score is 6.1 out of 10.