Description
Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion (and optionally VLAN0 headers).
Published: 2022-09-27
Score: 4.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-14600 Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion (and optionally VLAN0 headers).
History

Tue, 04 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

Wed, 21 May 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2025-11-04T19:12:28.789Z

Reserved: 2021-03-01T00:00:00.000Z

Link: CVE-2021-27862

cve-icon Vulnrichment

Updated: 2025-11-04T19:12:28.789Z

cve-icon NVD

Status : Modified

Published: 2022-09-27T19:15:09.403

Modified: 2025-11-04T20:16:00.053

Link: CVE-2021-27862

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-09-29T12:30:00Z

Links: CVE-2021-27862 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses