CVE-2018-0180: Cisco IOS Software Denial-of-Service Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.
CSIRTS triage
- What
- A vulnerability in the Login Enhancements feature could allow an unauthenticated attacker to trigger a denial of service condition.
- Who is affected
- Cisco IOS Software users are at risk if they have the Login Block feature enabled.
- Urgency
- Immediate action is required as the vulnerability is critical and actively exploited.
- Action
- Update Cisco IOS Software to the latest version to mitigate the risk.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2018-0180
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2018-0180Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 91% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2018-0180 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Cisco IOS Software
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCisco IOS XE Software Denial of Service Vulnerabilitycisco-psirt · 2026-04-02
- criticalexploitedCVE-2025-20352: Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerabilitycisa-kev · 2025-09-29
- criticalexploitedCVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycisa-kev · 2023-04-19
- criticalexploitedCVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2017-12233: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2018-0174: Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerabilitycisa-kev · 2022-03-03
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