Vulnerability · CVE-2021-47708
COMMAX Smart Home System CDP-1020n contains an SQL injection vulnerability that allows attackers to bypass authentication by injecting arbitrary SQL code through the 'id' parameter
Published Dec 9, 2025 · catalog updated Jul 15, 2026 · COMMAX Co., Ltd. Smart Home IoT Control System
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2021-47708. EPSS is 0.53%. Act only if a listed version of COMMAX Co., Ltd. Smart Home IoT Control System is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.53%
- Remediation
- Vendor / distro source
- Affected products
- vendor COMMAX Co., Ltd. Smart Home IoT Control System 481 System
COMMAX Smart Home System CDP-1020n contains an SQL injection vulnerability that allows attackers to bypass authentication by injecting arbitrary SQL code through the 'id' parameter in 'loginstart.asp'. Attackers can exploit this by sending a POST request with malicious 'id' values to manipulate database queries and gain unauthorized access.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor COMMAX Co., Ltd. Smart Home IoT Control System 481 System481 System
How to fix CVE-2021-47708
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2021-47708. EPSS is 0.53%. Act only if a listed version of COMMAX Co., Ltd. Smart Home IoT Control System is installed.
Which versions are affected?
Compare what you have installed with COMMAX Co., Ltd. Smart Home IoT Control System 481 System 481 System. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.53%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 9, 2025 · EUVD
Detected
COMMAX Smart Home System CDP-1020n contains an SQL injection vulnerability that allows attackers to bypass authentication by injecting arbitrary SQL code through the 'id' parameter in 'loginstart.asp'. Attackers can exploit this by sending a POST request with malicious 'id' values to manipulate database queries and gain unauthorized access.
Jul 15, 2026 · EUVD
Updated
COMMAX Smart Home System CDP-1020n contains an SQL injection vulnerability that allows attackers to bypass authentication by injecting arbitrary SQL code through the 'id' parameter in 'loginstart.asp'. Attackers can exploit this by sending a POST request with malicious 'id' values to manipulate database queries and gain unauthorized access.
Sources
- CVE.orgVulnerability recordCVE-2021-47708
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2021-47708
30-day exploitation probability 0.53%
first.org - EUVDVulnerability recordEUVD-2021-34731
COMMAX Smart Home System CDP-1020n contains an SQL injection vulnerability that allows attackers to bypass authentication by injecting arbitrary SQL code through the 'id' parameter in 'loginstart.asp'. Attackers can exploit this by sending a POST request with malicious 'id' value
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 26, 2026
- CVE.orgOct 26, 2026
- EUVDOct 26, 2026