Security readout for executives and security teams
This Cisco IOS XE flaw can let someone with local network adjacency bypass 802.1x access controls on certain MACsec-protected Layer 3 interfaces. The risk is concentrated in environments that use MACsec MKA with EAP-TLS and access-session closed mode. It is not described as remotely exploitable over the internet. Exposure appears limited to Cisco IOS XE devices with Layer 3 interfaces configured for MACsec MKA using EAP-TLS and access-session closed mode. Organizations without this feature combination are unlikely to be exposed based on the provided sources. Treat this as a targeted network access-control bypass issue. It deserves prompt validation in Cisco IOS XE environments using MACsec and 802.1x, especially where local ports are exposed to contractors, visitors, shared facilities, or campus access networks. Mitigation focus: Review Cisco's advisory for affected IOS XE releases and fixed software guidance.; Inventory IOS XE devices using MACsec MKA with EAP-TLS.; Prioritize interfaces running access-session closed mode in untrusted or shared locations..
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
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ATT&CK lookup starting points
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CWE-284: Authorization and privilege behavior lookup
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Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-15372 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 20180926 Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.