Tracker / CVE-2021-27853
CVE-2021-27853
Medium 4.7
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.
Affected products and versions
| cisco | catalyst_6503-e_firmware |
|---|---|
| cisco | catalyst_6504-e_firmware |
| cisco | catalyst_6506-e_firmware |
| cisco | catalyst_6509-e_firmware |
| cisco | catalyst_6509-neb-a_firmware |
| cisco | catalyst_6509-v-e_firmware |
| cisco | catalyst_6513-e_firmware |
| cisco | catalyst_6800ia_firmware |
| cisco | catalyst_6807-xl_firmware |
| cisco | catalyst_6840-x_firmware |
| cisco | catalyst_6880-x_firmware |
| cisco | catalyst_c6816-x-le_firmware |
| cisco | catalyst_c6824-x-le-40g_firmware |
| cisco | catalyst_c6832-x-le_firmware |
| cisco | catalyst_c6840-x-le-40g_firmware |
| cisco | ios_xe |
| cisco | meraki_ms210_firmware |
| cisco | meraki_ms225_firmware |
| cisco | meraki_ms250_firmware |
| cisco | meraki_ms350_firmware |
| cisco | meraki_ms355_firmware |
| cisco | meraki_ms390_firmware |
| cisco | meraki_ms410_firmware |
| cisco | meraki_ms420_firmware |
| cisco | meraki_ms425_firmware |
| cisco | meraki_ms450_firmware |
| cisco | n9k-c9316d-gx_firmware |
| cisco | n9k-c9332d-gx2b_firmware |
| cisco | n9k-c9348d-gx2a_firmware |
| cisco | n9k-c93600cd-gx_firmware |
| cisco | n9k-c9364d-gx2a_firmware |
| cisco | n9k-x9432c-s_firmware |
| cisco | n9k-x9464px_firmware |
| cisco | n9k-x9464tx2_firmware |
| cisco | n9k-x9564px_firmware |
| cisco | n9k-x9564tx_firmware |
| cisco | n9k-x9636c-r_firmware |
| cisco | n9k-x9636c-rx_firmware |
| cisco | n9k-x97160yc-ex_firmware |
| cisco | n9k-x9732c-ex_firmware |
| cisco | n9k-x9732c-fx_firmware |
| cisco | n9k-x9736c-ex_firmware |
| cisco | n9k-x9736c-fx_firmware |
| cisco | n9k-x9788tc-fx_firmware |
| cisco | nexus_92160yc-x_firmware |
| cisco | nexus_92300yc_firmware |
| cisco | nexus_92304qc_firmware |
| cisco | nexus_92348gc-x_firmware |
| cisco | nexus_9236c_firmware |
| cisco | nexus_9272q_firmware |
| cisco | nexus_93108tc-ex_firmware |
| cisco | nexus_93108tc-fx3p_firmware |
| cisco | nexus_93108tc-fx_firmware |
| cisco | nexus_93120tx_firmware |
| cisco | nexus_93180yc-ex_firmware |
| cisco | nexus_93180yc-fx3_firmware |
| cisco | nexus_93180yc-fx_firmware |
| cisco | nexus_93216tc-fx2_firmware |
| cisco | nexus_93240yc-fx2_firmware |
| cisco | nexus_9332c_firmware |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.