CVE-2021-278534.7MediumCWE-290

CVE-2021-27853: L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers

IEEE · 802.2

Vendor fix available · Affected: IEEE 802.2 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.8%probability of exploitation in the next 30 days

57th percentile

050100

Higher than 57% of scored CVEs

4.7MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products3

From the CVE record. A product or version that is not listed is unknown, not unaffected.

IEEE · 802.2from 802.2h-1997 up to and including 802.2h-1997
IETF · draft-ietf-v6ops-ra-guardfrom 08 up to and including 08
IETF · P802.1Qfrom D1.0 up to and including D1.0

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Authentication Bypass by Spoofing · Authentication
Vendor: IEEE
Published: September 2022
Band: Unlikely (under 1%), September 2022

CoverageNo articles yet

No CyberSIXT article names CVE-2021-27853 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.