CVEs / CVE-2018-0180

CVE-2018-0180: Cisco IOS Software Denial-of-Service Vulnerability

Known exploited in the CISA KEV catalog since 3 Mar 2022
medium 5.9 CVSS 3.1 (NVD)
EPSS 4.93% chance of exploitation in the next 30 days, higher than 92% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

A vulnerability in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in a denial of service (DoS) condition.
CISA, Known Exploited Vulnerabilities catalog

Description

Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in a denial of service (DoS) condition. These vulnerabilities affect Cisco devices that are running Cisco IOS Software Release 15.4(2)T, 15.4(3)M, or 15.4(2)CG and later. Cisco Bug IDs: CSCuy32360, CSCuz60599.
The CVE record, via NVD · published 28 Mar 2018 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a Cisco IOS	Cisco IOS	—

Exploitation

In CISA KEV since	3 Mar 2022
Due date for US federal agencies	17 Mar 2022
Used in ransomware campaigns	Unknown
Required action	Apply updates per vendor instructions.

Severity

CVSS 3.1	5.9 medium `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H` Scored by NVD
Weakness	CWE-399

References

CVE-2018-0180 on NVD
CVE-2018-0180 in the CISA KEV catalog
http://www.securityfocus.com/bid/103556 Broken Link, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-slogin Mitigation, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0180 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.