CVE-2021-1460

Cisco IOx Application Framework Denial of Service Vulnerability

HIGH
7.5
CVSS Score
Published: March 24, 2021 at 08:06 PM UTC
Updated: June 17, 2026 at 03:31 AM UTC
7 products affected across 1 vendorIOSCGR1000 FirmwareIC3000 Industrial Compute Gateway Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A vulnerability in the Cisco IOx Application Framework of Cisco 809 Industrial Integrated Services Routers (Industrial ISRs), Cisco 829 Industrial ISRs, Cisco CGR 1000 Compute Module, and Cisco IC3000 Industrial Compute Gateway could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient error handling during packet processing. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the IOx web server on an affected device. A successful exploit could allow the attacker to cause the IOx web server to stop processing requests, resulting in a DoS condition.

Affected

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

v < 1.12.0.3
Affected range stops below 1.12.0.3, so it looks safe — our inference, not a vendor statement
cisco-cgr1000 (same device)
v < 1.3.2
Affected range stops below 1.3.2, so it looks safe — our inference, not a vendor statement
cisco-ic3000-industrial-compute-gateway (same device)
v < 15.9(3)m3
Affected range stops below 15.9(3)m3, so it looks safe — our inference, not a vendor statement
cisco-809-industrial-integrated-services-router (environment) · cisco-829-industrial-integrated-services-router (environment)
All versions

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
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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