CVEInsight.
TrendingZero-DayExploreBrowseSearchSaved
CVEInsight.

Free vulnerability intelligence for developers, security teams, and researchers. Data sourced from public databases for informational purposes only.

Explore

HomeTrendingZero-Day WatchAttack TypesBrowse CVEsSearch

Legal

Privacy PolicyTerms of ServiceData Disclaimer

© 2026CVEInsight. For informational use only — not a substitute for professional security advice.

CVE data sourced from NVD / NIST & public disclosures.

cisco

catalyst_6807-xl_firmware

1 known vulnerability · sorted by CVSS score

CVE-2021-27853
MEDIUM4.7

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.

ieee / ieee_802.2+99
Adjacent
Published Sep 27, 2022