VULNERABILITY INTELLIGENCE
CVE-2021-27853
CVSS score4.7 MEDIUM
EPSS probability0.81%
CISA KEVNot currently listed
Published2022-09-27
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
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.
Weakness classification
- cret@cert.org: CWE-290
- nvd@nist.gov: CWE-290
Primary references
- cret@cert.org — Exploit, Third Party Advisory
- cret@cert.org — Technical Description, Third Party Advisory
- cret@cert.org — Third Party Advisory, US Government Resource
- cret@cert.org — Vendor Advisory
- cret@cert.org — Vendor Advisory
- cret@cert.org — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Technical Description, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory