Is CVE-2018-0189 being actively exploited?

CVE-2018-0189 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-0189?

CVE-2018-0189 has a CVSS 3.0 base score of 5.3 (MEDIUM).

CVE-2018-0189

MEDIUM · CVSS 5.3EPSS 1.0%EU EUVD

A vulnerability in the Forwarding Information Base (FIB) code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service (DoS) condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive routes. An attacker could exploit this vulnerability by injecting routes into the routing protocol that have a specific recursive pattern. The attacker must be in a position on the network that provides the ability to inject a number of recursive routes with a specific pattern. An exploit could allow the attacker to cause an affected device to reload, creating a DoS condition. Cisco Bug IDs: CSCva91655.

Key facts

CVSS score: 5.3 (v3.0)
Severity: MEDIUM
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-399
EPSS score: 1.0% (62th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-1012)
Published: March 28, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-1012 in the EU Vulnerability Database. Last updated in EUVD on December 2, 2024.

View on the EU Vulnerability Database

Affected products

cisco / ios xe

Certified products that may be affected

10 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Catalyst 4500 Series Wired Access Switches running IOS-XE 3.10 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-10906-2018 - archived
Cisco Catalyst 3K/4K Wired Access Switches running IOS-XE 3.8.0E - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10688-2016 - archived
Cisco Aggregation Services Router (ASR) 1000 Series, IOS XE 3.13 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10609-2015 - archived
Cisco Integrated Services Router 4400 Series (ISR-4400), IOS XE 3.13.0 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10600-2015 - archived
Cisco Catalyst 3650, 3850, 4500E (Sup7E, Sup7LE, Sup8E), 4500X, 4500XF running IOS-XE 3.6.1S - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10607-2014 - archived

See all 10 in the Security Certifications Explorer.

References

http://www.securityfocus.com/bid/103548(Third Party Advisory, VDB Entry)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-FIB-dos(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain