CVE DATABASE / CVE-2018-0167

CVE-2018-0167

Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

CVSS 8.8 · HIGH ⚠ CISA KEV — ACTIVELY EXPLOITED

On the CISA KEV catalog

Confirmed exploited in the wild. Added 2022-03-03. Federal remediation due 2022-03-17.
Required action: Apply updates per vendor instructions.

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.

CVSS 3.1 breakdown

Base score	8.8 (HIGH)
Vector	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector	ADJACENT_NETWORK
Attack complexity	LOW
Privileges required	NONE
User interaction	NONE
Scope	UNCHANGED
Confidentiality	HIGH
Integrity	HIGH
Availability	HIGH

Weakness type (CWE)

CWE-119

Affected products

Cisco iosCisco ios xeCisco ios xrCisco asr 9001Cisco asr 9006Cisco asr 9010Cisco asr 9904Cisco asr 9906Cisco asr 9910Cisco asr 9912Cisco asr 9922Rockwellautomation allen-bradley stratix 5900Rockwellautomation allen-bradley armorstratix 5700Rockwellautomation allen-bradley stratix 5400Rockwellautomation allen-bradley stratix 5410Rockwellautomation allen-bradley stratix 5700Rockwellautomation allen-bradley stratix 8000Rockwellautomation allen-bradley stratix 8300

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References

Data: NIST NVD + CISA KEV. NVD last modified 2026-01-14. Always verify against the vendor advisory before acting.