Security readout for executives and security teams
This old Cisco issue lets an unauthenticated attacker bypass 802.1x port controls on voice-enabled switch ports by abusing spoofed CDP messages, potentially reaching the voice VLAN. Business urgency depends on whether legacy Cisco switching and voice VLAN configurations remain in use. Exposure is most likely in environments with Cisco access switches using 802.1x, CDP, and voice VLAN features, especially legacy VoIP deployments. The provided affected-product metadata is incomplete, so validation requires device and configuration review against Cisco guidance. Treat this as a targeted legacy-network risk rather than an internet-scale emergency. Prioritize review where voice VLANs protect sensitive telephony, internal services, or regulated environments. Mitigation focus: Review Cisco advisory for affected platforms, versions, and official remediation guidance.; Inventory access switch ports using 802.1x with voice VLAN features.; Remove unnecessary voice VLAN behavior on ports that do not require it..
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
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CVE-2005-1942 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
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
- cisco-callmanager-voice-gain-access(20939)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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