CISA KEV · Known exploitedHigh

CVE-2018-0167

Cisco IOS, XR, and XE Software

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: 8.8
EPSS: 3.38%
CISA KEV: Listed
Published: 2018.03.29

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability3.38%

Technical severityCVSS 8.8

Vulnerability overview

Affected product and versions

Product: Cisco IOS, XR, and XE Software
Affected versions: Cisco IOS, IOS XE, and IOS XR, 5.2.0.base, >= 4.1 < 5.1.3, <= 15.6.3m1, <= 15.2\(6\)e0a, <= 15.2\(4a\)ea5
Fixed versions: 5.1.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.03.17

1
Identify
Confirm that Cisco IOS, XR, and XE Software and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-119
KEV added: 2022.03.03
Ransomware use: 미확인