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CVE-2021-1460

23
FAUCET Score

CVE-2021-1460 describes a Denial of Service (DoS) vulnerability in the Cisco IOx Application Framework affecting Cisco 809/829 Industrial ISRs, CGR 1000 Compute Modules, and IC3000 Industrial Compute Gateways. This flaw, stemming from insufficient error handling during packet processing, allows an unauthenticated, remote attacker to disrupt the IOx web server by sending a high rate of crafted TCP traffic. With a CVSS score of 7.5 (High), the attack requires no user interaction or privileges, and its impact is limited to availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 15.9\(3\)m3CPE matchmatch criteria
cpe:2.3:a:cisco:ios:*:*:*:*:*:*:*:*
< 1.12.0.3CPE matchmatch criteria
cpe:2.3:o:cisco:cgr1000_firmware:*:*:*:*:*:*:*:*
< 1.3.2CPE matchmatch criteria
cpe:2.3:o:cisco:ic3000_industrial_compute_gateway_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 47th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-dos-4Fgcjh6
Vendor Advisory