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CVE-2021-27853


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.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.7, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, for affected systems. Impacting 308 products from ieee, from ietf, from cisco and 305 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2022-09-27T18:15:09.527

Last Modified

2025-11-04T20:15:59.233

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.7 (MEDIUM)

Weaknesses
  • Type: Secondary
    CWE-290
  • Type: Primary
    CWE-290

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application ieee ieee_802.2 ≤ 802.2h-1997 Yes
Application ietf p802.1q ≤ d1.0 Yes
Operating System cisco catalyst_6503-e_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6503-e - No
Operating System cisco catalyst_6504-e_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6504-e - No
Operating System cisco catalyst_6506-e_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6506-e - No
Operating System cisco catalyst_6509-e_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6509-e - No
Operating System cisco catalyst_6509-neb-a_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6509-neb-a - No
Operating System cisco catalyst_6509-v-e_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6509-v-e - No
Operating System cisco catalyst_6513-e_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6513-e - No
Operating System cisco catalyst_6807-xl_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6807-xl - No
Operating System cisco catalyst_6840-x_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6840-x - No
Operating System cisco catalyst_6880-x_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6880-x - No
Operating System cisco catalyst_c6816-x-le_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_c6816-x-le - No
Operating System cisco catalyst_c6824-x-le-40g_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_c6824-x-le-40g - No
Operating System cisco catalyst_c6832-x-le_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_c6832-x-le - No
Operating System cisco catalyst_c6840-x-le-40g_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_c6840-x-le-40g - No
Operating System cisco catalyst_6800ia_firmware 15.5\(01.01.85\)sy07 Yes
Hardware cisco catalyst_6800ia - No
Application cisco ios_xe 17.3.3 Yes
Operating System cisco ios_xe 15.2\(07\)e02 Yes
Operating System cisco ios_xe 15.2\(07\)e03 Yes
Operating System cisco ios_xe 17.4.1 Yes
Operating System cisco ios_xe 17.6.1 Yes
Hardware cisco catalyst_3650-12x48fd-e - No
Hardware cisco catalyst_3650-12x48fd-l - No
Hardware cisco catalyst_3650-12x48fd-s - No
Hardware cisco catalyst_3650-12x48uq-e - No
Hardware cisco catalyst_3650-12x48uq-l - No
Hardware cisco catalyst_3650-12x48uq-s - No
Hardware cisco catalyst_3650-12x48ur-e - No
Hardware cisco catalyst_3650-12x48ur-l - No
Hardware cisco catalyst_3650-12x48ur-s - No
Hardware cisco catalyst_3650-12x48uz-e - No
Hardware cisco catalyst_3650-12x48uz-l - No
Hardware cisco catalyst_3650-12x48uz-s - No
Hardware cisco catalyst_3650-24pd-e - No
Hardware cisco catalyst_3650-24pd-l - No
Hardware cisco catalyst_3650-24pd-s - No
Hardware cisco catalyst_3650-24pdm-e - No
Hardware cisco catalyst_3650-24pdm-l - No
Hardware cisco catalyst_3650-24pdm-s - No
Hardware cisco catalyst_3650-24ps-e - No
Hardware cisco catalyst_3650-24ps-l - No
Hardware cisco catalyst_3650-24ps-s - No
Hardware cisco catalyst_3650-24td-e - No
Hardware cisco catalyst_3650-24td-l - No
Hardware cisco catalyst_3650-24td-s - No
Hardware cisco catalyst_3650-24ts-e - No
Hardware cisco catalyst_3650-24ts-l - No
Hardware cisco catalyst_3650-24ts-s - No
Hardware cisco catalyst_3650-48fd-e - No
Hardware cisco catalyst_3650-48fd-l - No
Hardware cisco catalyst_3650-48fd-s - No
Hardware cisco catalyst_3650-48fq-e - No
Hardware cisco catalyst_3650-48fq-l - No
Hardware cisco catalyst_3650-48fq-s - No
Hardware cisco catalyst_3650-48fqm-e - No
Hardware cisco catalyst_3650-48fqm-l - No
Hardware cisco catalyst_3650-48fqm-s - No
Hardware cisco catalyst_3650-48fs-e - No
Hardware cisco catalyst_3650-48fs-l - No
Hardware cisco catalyst_3650-48fs-s - No
Hardware cisco catalyst_3650-48pd-e - No
Hardware cisco catalyst_3650-48pd-l - No
Hardware cisco catalyst_3650-48pd-s - No
Hardware cisco catalyst_3650-48pq-e - No
Hardware cisco catalyst_3650-48pq-l - No
Hardware cisco catalyst_3650-48pq-s - No
Hardware cisco catalyst_3650-48ps-e - No
Hardware cisco catalyst_3650-48ps-l - No
Hardware cisco catalyst_3650-48ps-s - No
Hardware cisco catalyst_3650-48td-e - No
Hardware cisco catalyst_3650-48td-l - No
Hardware cisco catalyst_3650-48td-s - No
Hardware cisco catalyst_3650-48tq-e - No
Hardware cisco catalyst_3650-48tq-l - No
Hardware cisco catalyst_3650-48tq-s - No
Hardware cisco catalyst_3650-48ts-e - No
Hardware cisco catalyst_3650-48ts-l - No
Hardware cisco catalyst_3650-48ts-s - No
Hardware cisco catalyst_3650-8x24pd-e - No
Hardware cisco catalyst_3650-8x24pd-l - No
Hardware cisco catalyst_3650-8x24pd-s - No
Hardware cisco catalyst_3650-8x24uq-e - No
Hardware cisco catalyst_3650-8x24uq-l - No
Hardware cisco catalyst_3650-8x24uq-s - No
Hardware cisco catalyst_3850-12s-e - No
Hardware cisco catalyst_3850-12s-s - No
Hardware cisco catalyst_3850-12xs-e - No
Hardware cisco catalyst_3850-12xs-s - No
Hardware cisco catalyst_3850-16xs-e - No
Hardware cisco catalyst_3850-16xs-s - No
Hardware cisco catalyst_3850-24p-e - No
Hardware cisco catalyst_3850-24p-l - No
Hardware cisco catalyst_3850-24pw-s - No
Hardware cisco catalyst_3850-24s-e - No
Hardware cisco catalyst_3850-24s-s - No
Hardware cisco catalyst_3850-24t-e - No
Hardware cisco catalyst_3850-24t-l - No
Hardware cisco catalyst_3850-24t-s - No
Hardware cisco catalyst_3850-24u-e - No
Hardware cisco catalyst_3850-24u-l - No
Hardware cisco catalyst_3850-24u-s - No
Hardware cisco catalyst_3850-24xs-e - No
Hardware cisco catalyst_3850-24xs-s - No
Hardware cisco catalyst_3850-24xu-e - No
Hardware cisco catalyst_3850-24xu-l - No
Hardware cisco catalyst_3850-24xu-s - No
Hardware cisco catalyst_3850-32xs-e - No
Hardware cisco catalyst_3850-32xs-s - No
Hardware cisco catalyst_3850-48f-e - No
Hardware cisco catalyst_3850-48f-l - No
Hardware cisco catalyst_3850-48f-s - No
Hardware cisco catalyst_3850-48p-e - No
Hardware cisco catalyst_3850-48p-l - No
Hardware cisco catalyst_3850-48p-s - No
Hardware cisco catalyst_3850-48pw-s - No
Hardware cisco catalyst_3850-48t-e - No
Hardware cisco catalyst_3850-48t-l - No
Hardware cisco catalyst_3850-48t-s - No
Hardware cisco catalyst_3850-48u-e - No
Hardware cisco catalyst_3850-48u-l - No
Hardware cisco catalyst_3850-48u-s - No
Hardware cisco catalyst_3850-48xs-e - No
Hardware cisco catalyst_3850-48xs-f-e - No
Hardware cisco catalyst_3850-48xs-f-s - No
Hardware cisco catalyst_3850-48xs-s - No
Hardware cisco catalyst_9200 - No
Hardware cisco catalyst_9200cx - No
Hardware cisco catalyst_9200l - No
Hardware cisco catalyst_9300 - No
Hardware cisco catalyst_9300l - No
Hardware cisco catalyst_9300lm - No
Hardware cisco catalyst_9300x - No
Hardware cisco catalyst_9400 - No
Hardware cisco catalyst_9500 - No
Hardware cisco catalyst_9500h - No
Hardware cisco catalyst_9600 - No
Hardware cisco catalyst_9600x - No
Hardware cisco catalyst_c3850-12x48u-e - No
Hardware cisco catalyst_c3850-12x48u-l - No
Hardware cisco catalyst_c3850-12x48u-s - No
Operating System cisco meraki_ms390_firmware - Yes
Hardware cisco meraki_ms390 - No
Operating System cisco meraki_ms210_firmware - Yes
Hardware cisco meraki_ms210 - No
Operating System cisco meraki_ms225_firmware - Yes
Hardware cisco meraki_ms225 - No
Operating System cisco meraki_ms250_firmware - Yes
Hardware cisco meraki_ms250 - No
Operating System cisco meraki_ms350_firmware - Yes
Hardware cisco meraki_ms350 - No
Operating System cisco meraki_ms355_firmware - Yes
Hardware cisco meraki_ms355 - No
Operating System cisco meraki_ms410_firmware - Yes
Hardware cisco meraki_ms410 - No
Operating System cisco meraki_ms420_firmware - Yes
Hardware cisco meraki_ms420 - No
Operating System cisco meraki_ms425_firmware - Yes
Hardware cisco meraki_ms425 - No
Operating System cisco meraki_ms450_firmware - Yes
Hardware cisco meraki_ms450 - No
Operating System cisco nexus_93180yc-ex_firmware 9.3\(5\) Yes
Hardware cisco nexus_93180yc-ex - No
Operating System cisco nexus_93180yc-fx_firmware 9.3\(5\) Yes
Hardware cisco nexus_93180yc-fx - No
Operating System cisco nexus_93180yc-fx3_firmware 9.3\(5\) Yes
Hardware cisco nexus_93180yc-fx3 - No
Operating System cisco nexus_93240yc-fx2_firmware 9.3\(5\) Yes
Hardware cisco nexus_93240yc-fx2 - No
Operating System cisco nexus_93360yc-fx2_firmware 9.3\(5\) Yes
Hardware cisco nexus_93360yc-fx2 - No
Operating System cisco nexus_93120tx_firmware 9.3\(5\) Yes
Hardware cisco nexus_93120tx - No
Operating System cisco nexus_93108tc-ex_firmware 9.3\(5\) Yes
Hardware cisco nexus_93108tc-ex - No
Operating System cisco nexus_9348gc-fxp_firmware 9.3\(5\) Yes
Hardware cisco nexus_9348gc-fxp - No
Operating System cisco nexus_93108tc-fx_firmware 9.3\(5\) Yes
Hardware cisco nexus_93108tc-fx - No
Operating System cisco nexus_93108tc-fx3p_firmware 9.3\(5\) Yes
Hardware cisco nexus_93108tc-fx3p - No
Operating System cisco nexus_93216tc-fx2_firmware 9.3\(5\) Yes
Hardware cisco nexus_93216tc-fx2 - No
Operating System cisco n9k-c9316d-gx_firmware 9.3\(5\) Yes
Hardware cisco n9k-c9316d-gx - No
Operating System cisco n9k-c93600cd-gx_firmware 9.3\(5\) Yes
Hardware cisco n9k-c93600cd-gx - No
Operating System cisco n9k-c9332d-gx2b_firmware 9.3\(5\) Yes
Hardware cisco n9k-c9332d-gx2b - No
Operating System cisco n9k-c9348d-gx2a_firmware 9.3\(5\) Yes
Hardware cisco n9k-c9348d-gx2a - No
Operating System cisco n9k-c9364d-gx2a_firmware 9.3\(5\) Yes
Hardware cisco n9k-c9364d-gx2a - No
Operating System cisco n9k-x97160yc-ex_firmware 9.3\(5\) Yes
Hardware cisco n9k-x97160yc-ex - No
Operating System cisco n9k-x9788tc-fx_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9788tc-fx - No
Operating System cisco n9k-x9564px_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9564px - No
Operating System cisco n9k-x9464px_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9464px - No
Operating System cisco n9k-x9564tx_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9564tx - No
Operating System cisco n9k-x9464tx2_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9464tx2 - No
Operating System cisco nexus_9636pq_firmware 9.3\(5\) Yes
Hardware cisco nexus_9636pq - No
Operating System cisco nexus_x9636q-r_firmware 9.3\(5\) Yes
Hardware cisco nexus_x9636q-r - No
Operating System cisco nexus_9536pq_firmware 9.3\(5\) Yes
Hardware cisco nexus_9536pq - No
Operating System cisco nexus_9432pq_firmware 9.3\(5\) Yes
Hardware cisco nexus_9432pq - No
Operating System cisco nexus_9736pq_firmware 9.3\(5\) Yes
Hardware cisco nexus_9736pq - No
Operating System cisco n9k-x9736c-fx_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9736c-fx - No
Operating System cisco n9k-x9732c-ex_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9732c-ex - No
Operating System cisco n9k-x9732c-fx_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9732c-fx - No
Operating System cisco n9k-x9736c-ex_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9736c-ex - No
Operating System cisco n9k-x9636c-rx_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9636c-rx - No
Operating System cisco n9k-x9636c-r_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9636c-r - No
Operating System cisco n9k-x9432c-s_firmware 9.3\(5\) Yes
Hardware cisco n9k-x9432c-s - No
Operating System cisco nexus_9716d-gx_firmware 9.3\(5\) Yes
Hardware cisco nexus_9716d-gx - No
Operating System cisco nexus_9504_firmware 9.3\(5\) Yes
Hardware cisco nexus_9504 - No
Operating System cisco nexus_9508_firmware 9.3\(5\) Yes
Hardware cisco nexus_9508 - No
Operating System cisco nexus_9516_firmware 9.3\(5\) Yes
Hardware cisco nexus_9516 - No
Operating System cisco nexus_92160yc-x_firmware 9.3\(5\) Yes
Hardware cisco nexus_92160yc-x - No
Operating System cisco nexus_9272q_firmware 9.3\(5\) Yes
Hardware cisco nexus_9272q - No
Operating System cisco nexus_92304qc_firmware 9.3\(5\) Yes
Hardware cisco nexus_92304qc - No
Operating System cisco nexus_9236c_firmware 9.3\(5\) Yes
Hardware cisco nexus_9236c - No
Operating System cisco nexus_92300yc_firmware 9.3\(5\) Yes
Hardware cisco nexus_92300yc - No
Operating System cisco nexus_92348gc-x_firmware 9.3\(5\) Yes
Hardware cisco nexus_92348gc-x - No
Operating System cisco nexus_9364c_firmware 9.3\(5\) Yes
Hardware cisco nexus_9364c - No
Operating System cisco nexus_9336c-fx2_firmware 9.3\(5\) Yes
Hardware cisco nexus_9336c-fx2 - No
Operating System cisco nexus_9336c-fx2-e_firmware 9.3\(5\) Yes
Hardware cisco nexus_9336c-fx2-e - No
Operating System cisco nexus_9332c_firmware 9.3\(5\) Yes
Hardware cisco nexus_9332c - No
Operating System cisco nexus_9364c-gx_firmware 9.3\(5\) Yes
Hardware cisco nexus_9364c-gx - No
Operating System cisco nexus_9800_firmware 9.3\(5\) Yes
Hardware cisco nexus_9800 - No
Operating System cisco sf500-24_firmware 3.0.0.61 Yes
Hardware cisco sf500-24 - No
Operating System cisco sf-500-24mp_firmware 3.0.0.61 Yes
Hardware cisco sf-500-24mp - No
Operating System cisco sf500-24p_firmware 3.0.0.61 Yes
Hardware cisco sf500-24p - No
Operating System cisco sf500-48_firmware 3.0.0.61 Yes
Hardware cisco sf500-48 - No
Operating System cisco sf500-48mp_firmware 3.0.0.61 Yes
Hardware cisco sf500-48mp - No
Operating System cisco sf500-18p_firmware 3.0.0.61 Yes
Hardware cisco sf500-18p - No
Operating System cisco sg500-28_firmware 3.0.0.61 Yes
Hardware cisco sg500-28 - No
Operating System cisco sg500-28mpp_firmware 3.0.0.61 Yes
Hardware cisco sg500-28mpp - No
Operating System cisco sg500-28p_firmware 3.0.0.61 Yes
Hardware cisco sg500-28p - No
Operating System cisco sg500-52_firmware 3.0.0.61 Yes
Hardware cisco sg500-52 - No
Operating System cisco sg500-52mp_firmware 3.0.0.61 Yes
Hardware cisco sg500-52mp - No
Operating System cisco sg500-52p_firmware 3.0.0.61 Yes
Hardware cisco sg500-52p - No
Operating System cisco sg500x-24_firmware 3.0.0.61 Yes
Hardware cisco sg500x-24 - No
Operating System cisco sg500x-24mpp_firmware 3.0.0.61 Yes
Hardware cisco sg500x-24mpp - No
Operating System cisco sg500x-24p_firmware 3.0.0.61 Yes
Hardware cisco sg500x-24p - No
Operating System cisco sg500x-48_firmware 3.0.0.61 Yes
Hardware cisco sg500x-48 - No
Operating System cisco sg500x-48mpp_firmware 3.0.0.61 Yes
Hardware cisco sg500x-48mpp - No
Operating System cisco sg500x-48p_firmware 3.0.0.61 Yes
Hardware cisco sg500x-48p - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For ieee's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.