Security readout for executives and security teams
Plain-English summary
This CVE affects Cisco industrial routers that support the IOx application environment. A nearby network attacker could potentially disrupt the device or run code with elevated privileges. The main business risk is outage or loss of control in industrial, utility, or remote-site routing environments.
Executive priority
Treat as high priority for industrial networks using the named Cisco platforms. The risk is most urgent where router outages or unauthorized code execution could interrupt field operations, utility connectivity, or remote-site availability.
Technical view
Cisco describes multiple input-validation vulnerabilities in the IOx application environment on Cisco 809 and 829 Industrial ISRs and Cisco CGR1000 routers running Cisco IOS Software. CVSS 8.1 indicates adjacent-network access, low complexity, no privileges, no user interaction, and high integrity and availability impact.
Likely exposure
Exposure is limited to environments using the named Cisco industrial router families with affected IOS/IOx configurations. The CVSS vector requires adjacent-network reachability, so internet-wide exposure is not established by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. The vulnerability is still important because no credentials or user interaction are required once an attacker has adjacent-network access.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory metadata in the provided bundle. Do not assume broader Cisco IOS exposure, internet exploitability, public exploit availability, or specific fixed releases without reviewing Cisco’s advisory details.
Mitigation direction
- Identify Cisco 809, 829, and CGR1000 routers running Cisco IOS with IOx enabled.
- Review the Cisco advisory for affected and fixed software guidance.
- Apply vendor-supported updates or configuration changes named by Cisco.
- Restrict untrusted access to adjacent network segments containing affected routers.
- Prioritize industrial and remote-site routers where outage would affect operations.
Validation and detection
- Inventory router model, IOS version, and IOx application-environment status.
- Compare findings against the Cisco advisory and CVE record.
- Confirm adjacent-network exposure from user, contractor, wireless, or field networks.
- Review device monitoring for unexpected reloads, crashes, or IOx anomalies.
- Document compensating controls where updates cannot be applied immediately.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-3199 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H2.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200603 Cisco IOx Application Environment for IOS Software for Cisco Industrial Routers VulnerabilitiesCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.