Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-14591 Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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

Type Values Removed Values Added
References

Wed, 21 May 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2025-11-04T19:12:25.432Z

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

Link: CVE-2021-27853

cve-icon Vulnrichment

Updated: 2025-11-04T19:12:25.432Z

cve-icon NVD

Status : Modified

Published: 2022-09-27T18:15:09.527

Modified: 2025-11-04T20:15:59.233

Link: CVE-2021-27853

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-09-27T10:30:00Z

Links: CVE-2021-27853 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses