Security readout for executives and security teams
This affects Cisco Catalyst 4000 Series Switches running Cisco IOS XE using dynamic ACLs with 802.1x. A physically adjacent, unauthenticated person could cause failed 802.1x handling to leave a port open on the default VLAN, bypassing intended network access control. It is most urgent where untrusted people can reach wired switch ports. Exposure is likely limited to Cisco Catalyst 4000 Series Switches running Cisco IOS XE with dynamic ACL assignment and 802.1x behavior matching the advisory. Risk depends heavily on physical or adjacent network access to affected switch ports and the sensitivity of the default VLAN. Treat this as a targeted network access-control bypass, not a broad remote compromise. Prioritize facilities with accessible Ethernet ports, shared offices, labs, classrooms, retail areas, or visitor spaces. Business urgency rises if the default VLAN can reach internal services or if Catalyst 4000 infrastructure remains unpatched. Mitigation focus: Review the Cisco advisory for fixed IOS XE releases or vendor-approved workarounds.; Inventory Cisco Catalyst 4000 Series Switches and map IOS XE versions in production.; Prioritize sites where public or shared areas expose wired switch ports..
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-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupCVE-2017-12213 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
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
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-catCVE reference · x_refsource_CONFIRM
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 Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.