CVE-2021-1367

Cisco NX-OS Software Protocol Independent Multicast Denial of Service Vulnerability

MEDIUM

4.3

CVSS Score

Published: February 24, 2021 at 07:30 PM UTC

Updated: June 17, 2026 at 03:31 AM UTC

43 products affected across 1 vendorNx OSNexus 9508Nexus 93120Tx

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Severity

MEDIUM4.3

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

A vulnerability in the Protocol Independent Multicast (PIM) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted PIM packet to an affected device. A successful exploit could allow the attacker to cause a traffic loop, resulting in a DoS condition.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nx OS · Cisconpm

95%

9.3(5)

cisco-nexus-9000v-switch (environment) · cisco-nexus-92160yc-x-switch (environment) · cisco-nexus-92300yc-switch (environment) · cisco-nexus-92304qc-switch (environment) · cisco-nexus-92348gc-x-switch (environment) · cisco-nexus-9236c-switch (environment) · cisco-nexus-9272q-switch (environment) · cisco-nexus-93108tc-ex-24-switch (environment) · cisco-nexus-93108tc-ex-switch (environment) · cisco-nexus-93108tc-fx-24 (environment) · cisco-nexus-93108tc-fx-switch (environment) · cisco-nexus-93120tx (environment) · cisco-nexus-93128tx (environment) · cisco-nexus-9316d-gx (environment) · cisco-nexus-93180lc-ex (environment) · cisco-nexus-93180yc-ex (environment) · cisco-nexus-93180yc-ex-24 (environment) · cisco-nexus-93180yc-fx (environment) · cisco-nexus-93180yc-fx-24 (environment) · cisco-nexus-93180yc-fx3 (environment) · cisco-nexus-93180yc-fx3s (environment) · cisco-nexus-93216tc-fx2 (environment) · cisco-nexus-93240yc-fx2 (environment) · cisco-nexus-9332c (environment) · cisco-nexus-9332pq (environment) · cisco-nexus-93360yc-fx2 (environment) · cisco-nexus-9336c-fx2 (environment) · cisco-nexus-9336c-fx2-e (environment) · cisco-nexus-9336pq (environment) · cisco-nexus-9348gc-fxp (environment) · cisco-nexus-93600cd-gx (environment) · cisco-nexus-9364c (environment) · cisco-nexus-9364c-gx (environment) · cisco-nexus-9372px (environment) · cisco-nexus-9372px-e (environment) · cisco-nexus-9372tx (environment) · cisco-nexus-9372tx-e (environment) · cisco-nexus-9396px (environment) · cisco-nexus-9396tx (environment) · cisco-nexus-9504 (environment) · cisco-nexus-9508 (environment) · cisco-nexus-9516 (environment)

Nexus 9000V Switch · Ciscodevice

80%

All versions

Nexus 92160Yc-X Switch · Ciscodevice

80%

All versions

Nexus 92300Yc Switch · Ciscodevice

80%

All versions

Nexus 92304Qc Switch · Ciscodevice

80%

All versions