HomeIeeeCVE-2021-27854

CVE-2021-27854

MEDIUM
4.7CVSS
Published: 2022-09-27
Updated: 2025-11-04
AI Analysis

Description

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using combinations of VLAN 0 headers, LLC/SNAP headers, and converting frames from Ethernet to Wifi and its reverse.

CVSS Metrics

Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Attack Vector
adjacent network
Complexity
low
Privileges
none
User Action
none
Scope
changed
Confidentiality
none
Integrity
low
Availability
none
Weaknesses
CWE-290CWE-290

Metadata

Primary Vendor
IEEE
Published
9/27/2022
Last Modified
11/4/2025
Source
NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

ieee : ieee_802.2ietf : p802.1q

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CVE-CVE-2021-27854 | MEDIUM Severity | CVEDatabase.com | CVEDatabase.com