CVE-2020-3407

Cisco IOS XE Software RESTCONF and NETCONF-YANG Access Control List Denial of Service Vulnerability

HIGH
8.6
CVSS Score
Published: September 24, 2020 at 06:02 PM UTC
Updated: June 17, 2026 at 03:18 AM UTC
128 products affected across 1 vendorIOS XeAsr 1002-xAsr 1006

Using Cisco IOS XE Software by Cisco?

Get instant alerts when new vulnerabilities affect Cisco IOS XE Software - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH8.6
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

A vulnerability in the RESTCONF and NETCONF-YANG access control list (ACL) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect processing of the ACL that is tied to the RESTCONF or NETCONF-YANG feature. An attacker could exploit this vulnerability by accessing the device using RESTCONF or NETCONF-YANG. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Affected

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

cisco-1100-4g-integrated-services-router (environment) · cisco-1100-4gltegb-integrated-services-router (environment) · cisco-1100-4gltena-integrated-services-router (environment) · cisco-1100-4p-integrated-services-router (environment) · cisco-1100-6g-integrated-services-router (environment) · cisco-1100-8p-integrated-services-router (environment) · cisco-1100-integrated-services-router (environment) · cisco-1100-lte-integrated-services-router (environment) · cisco-1101-4p-integrated-services-router (environment) · cisco-1101-integrated-services-router (environment) · cisco-1109-2p-integrated-services-router (environment) · cisco-1109-4p-integrated-services-router (environment) · cisco-1109-integrated-services-router (environment) · cisco-1111x-8p-integrated-services-router (environment) · cisco-1111x-integrated-services-router (environment) · cisco-111x-integrated-services-router (environment) · cisco-1120-integrated-services-router (environment) · cisco-1160-integrated-services-router (environment) · cisco-4221-integrated-services-router (environment) · cisco-4331-integrated-services-router (environment) · cisco-4431-integrated-services-router (environment) · cisco-4451-integrated-services-router (environment) · cisco-4461-integrated-services-router (environment) · cisco-asr-1000-x (environment) · cisco-asr-1001 (environment) · cisco-asr-1001-x (environment) · cisco-asr-1002 (environment) · cisco-asr-1002-x (environment) · cisco-asr-1004 (environment) · cisco-asr-1006 (environment) · cisco-asr-1013 (environment) · cisco-asr1001-hx (environment) · cisco-asr1001-hx-rf (environment) · cisco-asr1001-x-rf (environment) · cisco-asr1001-x-ws (environment) · cisco-asr1002-hx (environment) · cisco-asr1002-hx-rf (environment) · cisco-asr1002-hx-ws (environment) · cisco-asr1002-x-rf (environment) · cisco-asr1002-x-ws (environment) · cisco-catalyst-9800-40 (environment) · cisco-catalyst-9800-80 (environment) · cisco-catalyst-9800-cl (environment) · cisco-catalyst-9800-l (environment) · cisco-catalyst-9800-l-c (environment) · cisco-catalyst-9800-l-f (environment) · cisco-catalyst-c9200-24p (environment) · cisco-catalyst-c9200-24t (environment) · cisco-catalyst-c9200-48p (environment) · cisco-catalyst-c9200-48t (environment) · cisco-catalyst-c9200l-24p-4g (environment) · cisco-catalyst-c9200l-24p-4x (environment) · cisco-catalyst-c9200l-24pxg-2y (environment) · cisco-catalyst-c9200l-24pxg-4x (environment) · cisco-catalyst-c9200l-24t-4g (environment) · cisco-catalyst-c9200l-24t-4x (environment) · cisco-catalyst-c9200l-48p-4g (environment) · cisco-catalyst-c9200l-48p-4x (environment) · cisco-catalyst-c9200l-48pxg-2y (environment) · cisco-catalyst-c9200l-48pxg-4x (environment) · cisco-catalyst-c9200l-48t-4g (environment) · cisco-catalyst-c9200l-48t-4x (environment) · cisco-catalyst-c9300-24p (environment) · cisco-catalyst-c9300-24s (environment) · cisco-catalyst-c9300-24t (environment) · cisco-catalyst-c9300-24u (environment) · cisco-catalyst-c9300-24ux (environment) · cisco-catalyst-c9300-48p (environment) · cisco-catalyst-c9300-48s (environment) · cisco-catalyst-c9300-48t (environment) · cisco-catalyst-c9300-48u (environment) · cisco-catalyst-c9300-48un (environment) · cisco-catalyst-c9300-48uxm (environment) · cisco-catalyst-c9300l-24p-4g (environment) · cisco-catalyst-c9300l-24p-4x (environment) · cisco-catalyst-c9300l-24t-4g (environment) · cisco-catalyst-c9300l-24t-4x (environment) · cisco-catalyst-c9300l-48p-4g (environment) · cisco-catalyst-c9300l-48p-4x (environment) · cisco-catalyst-c9300l-48t-4g (environment) · cisco-catalyst-c9300l-48t-4x (environment) · cisco-catalyst-c9404r (environment) · cisco-catalyst-c9407r (environment) · cisco-catalyst-c9410r (environment) · cisco-catalyst-c9500-12q (environment) · cisco-catalyst-c9500-16x (environment) · cisco-catalyst-c9500-24q (environment) · cisco-catalyst-c9500-24y4c (environment) · cisco-catalyst-c9500-32c (environment) · cisco-catalyst-c9500-32qc (environment) · cisco-catalyst-c9500-40x (environment) · cisco-catalyst-c9500-48y4c (environment) · cisco-csr-1000v (environment) · cisco-ws-c3650-12x48uq (environment) · cisco-ws-c3650-12x48ur (environment) · cisco-ws-c3650-12x48uz (environment) · cisco-ws-c3650-24pd (environment) · cisco-ws-c3650-24pdm (environment) · cisco-ws-c3650-24ps (environment) · cisco-ws-c3650-24td (environment) · cisco-ws-c3650-24ts (environment) · cisco-ws-c3650-48fd (environment) · cisco-ws-c3650-48fq (environment) · cisco-ws-c3650-48fqm (environment) · cisco-ws-c3650-48fs (environment) · cisco-ws-c3650-48pd (environment) · cisco-ws-c3650-48pq (environment) · cisco-ws-c3650-48ps (environment) · cisco-ws-c3650-48td (environment) · cisco-ws-c3650-48tq (environment) · cisco-ws-c3650-48ts (environment) · cisco-ws-c3650-8x24uq (environment) · cisco-ws-c3850 (environment) · cisco-ws-c3850-12s (environment) · cisco-ws-c3850-12x48u (environment) · cisco-ws-c3850-12xs (environment) · cisco-ws-c3850-24p (environment) · cisco-ws-c3850-24s (environment) · cisco-ws-c3850-24t (environment) · cisco-ws-c3850-24u (environment) · cisco-ws-c3850-24xs (environment) · cisco-ws-c3850-24xu (environment) · cisco-ws-c3850-48f (environment) · cisco-ws-c3850-48p (environment) · cisco-ws-c3850-48t (environment) · cisco-ws-c3850-48u (environment) · cisco-ws-c3850-48xs (environment)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card