CVE-2018-0167
CVE-2018-0167 is a high-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-03). The underlying weakness is classified as CWE-119.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 8.3
- EPSS exploit prediction: 3% (88th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2022-03-03)
- EU (EUVD) id: EUVD-2018-0990
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-03)
- Weakness: CWE-119
- Affected product: Cisco Ios
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2018-0167?
- 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.
- How severe is CVE-2018-0167?
- CVE-2018-0167 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-0167 being actively exploited?
- Yes. CVE-2018-0167 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2018-0167?
- CVE-2018-0167 primarily affects Cisco Ios. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2018-0167?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2018-0167 have an EU (EUVD) identifier?
- Yes. CVE-2018-0167 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-0990. It is also flagged as exploited in the EUVD (since 2022-03-03).
- When was CVE-2018-0167 published?
- CVE-2018-0167 was published on 2018-03-28 and last updated on 2026-06-17.
References
- 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
Affected products (5)
- cpe:2.3:o:cisco:ios:5.2.0.base:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:5.2.0.base:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
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