CVEvulnerability

CVE-2021-27853

4.7 MEDIUM Published 2022-09-27 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-09-27
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.7 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
4.7 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Weaknesses
CWE-290

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.

Affected configurations

• ieee ieee 802.2 (<= 802.2h-1997) • ietf p802.1q (<= d1.0) • cisco catalyst 6503-e firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6504-e firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6506-e firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6509-e firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6509-neb-a firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6509-v-e firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6513-e firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6807-xl firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6840-x firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6880-x firmware 15.5\(01.01.85\)sy07 • cisco catalyst c6816-x-le firmware 15.5\(01.01.85\)sy07 • cisco catalyst c6824-x-le-40g firmware 15.5\(01.01.85\)sy07 • cisco catalyst c6832-x-le firmware 15.5\(01.01.85\)sy07 • cisco catalyst c6840-x-le-40g firmware 15.5\(01.01.85\)sy07 • cisco catalyst 6800ia firmware 15.5\(01.01.85\)sy07 • cisco ios xe 17.3.3 • cisco ios xe 15.2\(07\)e02 • cisco ios xe 15.2\(07\)e03 • cisco ios xe 17.4.1 • cisco ios xe 17.6.1 • cisco meraki ms390 firmware • cisco meraki ms210 firmware • cisco meraki ms225 firmware • cisco meraki ms250 firmware • cisco meraki ms350 firmware • cisco meraki ms355 firmware • cisco meraki ms410 firmware • cisco meraki ms420 firmware • cisco meraki ms425 firmware • cisco meraki ms450 firmware • cisco nexus 93180yc-ex firmware 9.3\(5\) • cisco nexus 93180yc-fx firmware 9.3\(5\) • cisco nexus 93180yc-fx3 firmware 9.3\(5\) • cisco nexus 93240yc-fx2 firmware 9.3\(5\) • cisco nexus 93360yc-fx2 firmware 9.3\(5\) • cisco nexus 93120tx firmware 9.3\(5\) • cisco nexus 93108tc-ex firmware 9.3\(5\) • cisco nexus 9348gc-fxp firmware 9.3\(5\) • cisco nexus 93108tc-fx firmware 9.3\(5\) • cisco nexus 93108tc-fx3p firmware 9.3\(5\) • cisco nexus 93216tc-fx2 firmware 9.3\(5\) • cisco n9k-c9316d-gx firmware 9.3\(5\) • cisco n9k-c93600cd-gx firmware 9.3\(5\) • cisco n9k-c9332d-gx2b firmware 9.3\(5\) • cisco n9k-c9348d-gx2a firmware 9.3\(5\) • cisco n9k-c9364d-gx2a firmware 9.3\(5\) • cisco n9k-x97160yc-ex firmware 9.3\(5\) • cisco n9k-x9788tc-fx firmware 9.3\(5\) • cisco n9k-x9564px firmware 9.3\(5\) • cisco n9k-x9464px firmware 9.3\(5\) • cisco n9k-x9564tx firmware 9.3\(5\) • cisco n9k-x9464tx2 firmware 9.3\(5\) • cisco nexus 9636pq firmware 9.3\(5\) • cisco nexus x9636q-r firmware 9.3\(5\) • cisco nexus 9536pq firmware 9.3\(5\) • cisco nexus 9432pq firmware 9.3\(5\) • cisco nexus 9736pq firmware 9.3\(5\) • cisco n9k-x9736c-fx firmware 9.3\(5\) … and 40 more

Related

Weakness · CWE (1)

  • CWE-290 Authentication Bypass by Spoofing weakness

References