Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco network operating systems that run LLDP, a protocol used by neighboring network devices. An attacker on the same local network segment could crash affected equipment or potentially run code with elevated privileges. CISA lists it as known exploited, so exposed Cisco infrastructure deserves prompt attention.
Executive priority
Prioritize this as a high-risk network infrastructure issue. KEV status raises urgency, while adjacent access limits exposure compared with internet-facing flaws. Focus first on critical routing, switching, industrial, and shared-access network environments.
Technical view
CVE-2018-0167 covers multiple LLDP buffer overflows in Cisco IOS, IOS XE, and IOS XR. The CVSS vector requires adjacent network access, no authentication, low attack complexity, and no user interaction, with high confidentiality, integrity, and availability impact. The listed CWE is CWE-119.
Likely exposure
Exposure is most likely on Cisco IOS, IOS XE, or IOS XR devices where LLDP is enabled on interfaces reachable by untrusted or weakly controlled adjacent networks. The bundle does not provide specific vulnerable release ranges.
Exploitation context
Active exploitation is supported by the CISA KEV listing in the source bundle. The vulnerability is adjacent-only, so internet-wide remote exploitation is not indicated here, but compromise from local network, campus, data center, or industrial segments remains material.
Researcher notes
The provided evidence confirms affected Cisco OS families, LLDP subsystem impact, CVSS 8.8, CWE-119, and KEV status. It does not include exact vulnerable versions, fixed releases, or detailed Cisco workaround text, so validation should rely on the cited Cisco advisory.
Mitigation direction
- Review Cisco advisory for affected releases and vendor-approved fixed software.
- Inventory Cisco IOS, IOS XE, and IOS XR devices using LLDP.
- Prioritize remediation for devices on untrusted or shared adjacent networks.
- Apply Cisco-provided updates or mitigations after confirming release applicability.
- Track remediation against CISA KEV urgency and internal exposure.
Validation and detection
- Identify device OS family, software release, and LLDP usage.
- Compare devices against Cisco advisory applicability guidance.
- Map LLDP-enabled interfaces to adjacent network trust zones.
- Review crash, reload, or anomaly logs on affected Cisco devices.
- Document exceptions where vendor guidance cannot be applied immediately.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-0167 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldpCVE reference · x_refsource_CONFIRM
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03CVE reference · x_refsource_MISC
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04CVE reference · x_refsource_MISC
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0167CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.