AUGUST 4, 2026
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Case File

CVE-2021-27853

MEDIUM · CVSS 4.7 EPSS 0.71%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-09-27 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.7. See the original NVD description below for full technical details.

CVE
CVE-2021-27853
Severity
MEDIUM
CVSS
4.7
EPSS
0.71%

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)