Security readout for executives and security teams
Plain-English summary
This CVE describes possible command execution from DD-WRT's Diagnostic ping page in builds through 16214. The reported issue depends on shell metacharacters in the host field. Business risk is mainly for legacy devices where the administrative interface is reachable or an administrator can be tricked through CSRF.
Executive priority
Treat this as a legacy-device exposure review, not an emergency based on current evidence. Prioritize externally reachable or poorly managed DD-WRT administration interfaces, because command execution on network edge devices can matter even when sources describe disputed impact.
Technical view
The report says the Diagnostic page passes the ping host field unsafely, allowing arbitrary command execution through shell metacharacters. CSRF exploitation might be possible. DD-WRT maintainers considered the report invalid because it targets an old version, requires administrative privileges, and does not exceed admin access.
Likely exposure
Exposure appears limited to old DD-WRT builds through 16214, especially where the administrative web interface is accessible beyond trusted administrators. The source bundle does not provide normalized affected CPEs or a vendor-supported affected-version matrix.
Exploitation context
The provided sources do not show active exploitation, and CISA KEV status is false. The report describes a command-injection condition and possible CSRF, but the maintainers disputed the practical impact due to administrative privilege requirements and age of the software.
Researcher notes
Key uncertainty is vendor dispute and incomplete affected-product data. The CVE text reports command injection via the ping host field and possible CSRF, while maintainers argue administrative privileges are required and no additional access is gained.
Mitigation direction
- Inventory DD-WRT devices and record exact build numbers.
- Prioritize replacing or updating builds through 16214.
- Restrict administrative UI access to trusted management networks or VPN.
- Disable WAN exposure of router administration interfaces.
- Check DD-WRT guidance before relying on any specific fix.
Validation and detection
- Confirm whether any DD-WRT device runs build 16214 or older.
- Verify the Diagnostic page is inaccessible from untrusted networks.
- Review administration logs for unexpected Diagnostic page usage.
- Check router management exposure from external network paths.
- Document compensating controls where firmware cannot be updated.
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.
CVE-2020-13976 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://svn.dd-wrt.com/ticket/7039CVE reference · x_refsource_MISC
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.