Security readout for executives and security teams
Plain-English summary
CVE-2021-46456 is a command injection issue reported in D-Link DIR-823-Pro firmware v1.0.2. If an attacker can reach the affected management functionality, they may be able to make the router run unintended operating-system commands. The bundle does not provide CVSS, patch status, or confirmed exploitation.
Executive priority
Treat this as a high-priority network edge device risk if DIR-823-Pro v1.0.2 exists in the environment. Prioritize inventory and exposure reduction first because patch and exploit-status evidence is incomplete in the provided sources.
Technical view
The CVE describes command injection in the SetWLanACLSettings function through the wl(0).(0)_maclist parameter on D-Link DIR-823-Pro v1.0.2. Public references include the CVE record, CVE List entry, D-Link advisory pages, and a GitHub write-up. No CWE, CVSS vector, or vendor-confirmed remediation details are included in the bundle.
Likely exposure
Exposure is most likely where D-Link DIR-823-Pro devices running v1.0.2 are deployed and their administrative interface or relevant configuration paths are reachable by untrusted users. The bundle does not prove broader model or firmware impact.
Exploitation context
The bundle supports that arbitrary command execution is possible through a named parameter, but it does not cite CISA KEV listing, active exploitation, public scanning activity, or attacker use in the wild.
Researcher notes
The CVE description is specific about function and parameter, but the source bundle lacks CVSS, CWE, affected CPEs, and clear remediation text. Avoid expanding scope beyond DIR-823-Pro v1.0.2 unless vendor documentation confirms additional affected versions.
Mitigation direction
- Inventory D-Link DIR-823-Pro devices and confirm firmware versions.
- Review D-Link SAP10285 and security bulletin for vendor-supported guidance.
- Apply vendor-recommended firmware, replacement, or retirement guidance if available.
- Restrict management access to trusted administrative networks only.
- Disable remote administration when it is not operationally required.
- Monitor affected devices for unexpected configuration or administrative activity.
Validation and detection
- Confirm whether any DIR-823-Pro devices run firmware v1.0.2.
- Verify management interfaces are not exposed to the public internet.
- Check access controls around wireless ACL configuration features.
- Review D-Link advisories for exact remediation status and model scope.
- Look for unexpected administrative changes or device instability.
- Document any uncertainty where firmware or model identification is incomplete.
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.
Execution 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-2021-46456 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://www.dlink.com/en/security-bulletin/CVE reference · x_refsource_MISC
- https://github.com/pjqwudi/my_vuln/blob/main/D-link/vuln_26/26.mdCVE reference · x_refsource_MISC
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10285CVE 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.