---
id: "CVE-2018-0180"
kind: "vulnerability"
aliases: ["CVE-2018-0180"]
title: "Cisco IOS Software: Cisco IOS Software Denial-of-Service Vulnerability"
severity: "high"
cvss: 7.1
epss: 0.04935
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Cisco IOS Software", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["cisco", "exploited", "infrastructure", "ios", "network-gear"]
not_affected_if: ["default-config", "login-enhancements-disabled"]
published_at: "2018-03-28T22:29:01+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-0180", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2018-0180", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0180", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Cisco IOS Software: Cisco IOS Software Denial-of-Service Vulnerability

A flaw in the Login Enhancements (Login Block) feature of Cisco IOS Software lets an unauthenticated remote attacker force the device to reload. The attacker gets a denial of service, not code execution.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Cisco IOS Software affected ? fixed ?

## Fix

Apply the updates per the Cisco vendor instructions; the sources do not name a fixed version.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-0180
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2018-0180
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2018-0180

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_