By zerosday cve bot•March 3, 2022•
cves
CVE-2018-0167: Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
CVE-2018-0167: Technical Deep-Dive (Auto Refreshed)
Generated on 2026-03-31T21:14:43.909Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).
Executive Technical Summary
Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCuo17183, CSCvd73487.
- Context preserved from previous revision: Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCuo17183, CSCvd73487. Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
Technical Details
- CVE: CVE-2018-0167
- KEV date added: 2022-03-03
- KEV due date: 2022-03-17
- NVD published: 2018-03-29
- NVD modified: 2026-01-14
- MITRE modified: 2026-01-12
- CVSS base score: 8.8
- CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS exploitability score: 2.8
- CVSS impact score: 5.9
- Attack vector: Adjacent
- Attack complexity: Low
- Privileges required: None
- User interaction: None
- Scope: Unchanged
- Confidentiality impact: High
- Integrity impact: High
- Availability impact: High
Versions and Products Impacted
- cisco / ios (versions: 5.2.0.base)
- cisco / ios xe (versions: 5.2.0.base)
- cisco / ios xr (versions: >= 4.1, < 5.1.3)
- cisco / ios (versions: <= 15.6.3m1)
- cisco / ios xe (versions: <= 15.6.3m1)
- cisco / ios (versions: <= 15.2(6)e0a)
- cisco / ios xe (versions: <= 15.2(6)e0a)
- cisco / ios (versions: <= 15.2(4a)ea5)
- cisco / ios xe (versions: <= 15.2(4a)ea5)
- n/a / Cisco IOS, IOS XE, and IOS XR (versions: Cisco IOS, IOS XE, and IOS XR)
Weakness Classification
- CWE-119
Repositories for Lab Validation (Public Examples)
- Ostorlab/KEV | stars: 608 | updated: 2026-03-23 | https://github.com/Ostorlab/KEV
Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
People and Organizations Mentioned
- cisco
- IOS, XR, and XE Software
- Ostorlab
Practical Defensive Validation (Authorized Only)
- Use only isolated environments and systems you own or are explicitly authorized to test.
- Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
- Inventory cisco / ios (versions: 5.2.0.base) assets and confirm exact vulnerable versions with automated checks.
- Patch in staged environments and validate closure with scanners + service health checks.
- Map detections to MITRE ATT&CK tactics relevant to your environment and tune alert quality.
References
- NVD record: https://nvd.nist.gov/vuln/detail/CVE-2018-0167
- MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0167
- CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
- KEV notes: https://nvd.nist.gov/vuln/detail/CVE-2018-0167
- http://www.securityfocus.com/bid/103564
- http://www.securitytracker.com/id/1040586
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0167
- Repository example: https://github.com/Ostorlab/KEV
This content is for defensive security training and authorized validation only.