Security readout for executives and security teams
Plain-English summary
CVE-2021-47708 is a critical authentication bypass in COMMAX Smart Home IoT Control System CDP-1020n / 481 System. A remote unauthenticated attacker may gain unauthorized access by abusing SQL injection in the login flow. Public exploit information exists, but the provided sources do not show CISA KEV listing or confirmed active exploitation.
Executive priority
High priority for any organization operating affected COMMAX smart home control systems. The issue allows unauthenticated remote access and has public exploit information. Prioritize finding exposed devices, limiting access, and obtaining vendor remediation guidance.
Technical view
The issue is CWE-89 SQL injection in the id parameter of loginstart.asp. The CVSS 4.0 score is 9.3, with network attack vector, low complexity, no privileges, and no user interaction. Successful exploitation can impact confidentiality, integrity, and availability of the vulnerable system. The sources do not identify a vendor patch or fixed version.
Likely exposure
Organizations using COMMAX Smart Home IoT Control System CDP-1020n or 481 System are potentially exposed, especially if management or login interfaces are reachable from untrusted networks. Exposure should be verified through asset inventory and network access review.
Exploitation context
ExploitDB and third-party advisories publish exploit information, increasing practical risk. However, the bundle states KEV is false and provides no cited evidence of active exploitation in the wild. Treat internet-exposed systems as urgent until vendor guidance is confirmed.
Researcher notes
Evidence supports a critical SQL injection authentication bypass in loginstart.asp. Public exploit publication is cited, but no active exploitation evidence is provided. Patch status is unclear in the supplied sources, so remediation guidance should be validated directly with COMMAX or authoritative advisories.
Mitigation direction
- Identify any COMMAX CDP-1020n or 481 System deployments.
- Check COMMAX and trusted advisories for fixed firmware or vendor guidance.
- Remove direct internet exposure for affected login interfaces.
- Restrict access to trusted management networks or VPN only.
- Monitor authentication logs for unusual login attempts or SQL error patterns.
- Consider compensating controls if no vendor fix is available.
Validation and detection
- Confirm product model and version against the affected list.
- Review network paths to loginstart.asp and management interfaces.
- Check whether the device is internet-accessible or reachable by untrusted users.
- Verify whether vendor firmware or configuration guidance has been applied.
- Review logs for suspicious authentication bypass indicators.
- Document unresolved patch status and compensating controls.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47708 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
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50207CVE reference · exploit
- Official Product HomepageCVE reference · product
- Zero Science Lab Disclosure (ZSL-2021-5662)CVE reference · third-party-advisory
- Zero Science GitHub RepositoryCVE reference · product
- VulnCheck Advisory: COMMAX Smart Home IoT Control System SQL Injection Authentication BypassCVE reference · third-party-advisory
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 Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.