Realtek GPON router - Command Injection
Priority LOW 37CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
Realtek GPON router has insufficient filtering for special characters. A remote attacker authenticated as an administrator can exploit this vulnerability to perform command injection attacks, to execute arbitrary system command, manipulate system or disrupt service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01508 74th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Realtek | GPON router | SDK 1.9 | — | No fix listed | CNA |
- GPON router VendorRealtek Affected SDK 1.9 Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:realtek:usdk:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Realtek |
| cpe:2.3:a:realtek:usdk:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Realtek |
| cpe:2.3:a:realtek:usdk:2.2:*:*:*:*:*:*:* | 2.2 | Vulnerable | Realtek |
| cpe:2.3:a:realtek:xpon_software_development_kit:1.9:*:*:*:*:*:*:* | 1.9 | Vulnerable | Realtek |
| cpe:2.3:a:realtek:xpon_software_development_kit:3.3:*:*:*:*:*:*:* | 3.3 | Vulnerable | Realtek |
| cpe:2.3:a:realtek:xpon_software_development_kit:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Realtek |
| cpe:2.3:a:realtek:xpon_software_development_kit:4.1:*:*:*:*:*:*:* | 4.1 | Vulnerable | Realtek |
- cpe:2.3:a:realtek:usdk:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Realtek
- cpe:2.3:a:realtek:usdk:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Realtek
- cpe:2.3:a:realtek:usdk:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·Realtek
- cpe:2.3:a:realtek:xpon_software_development_kit:1.9:*:*:*:*:*:*:* Versions 1.9 Vulnerable ·Realtek
- cpe:2.3:a:realtek:xpon_software_development_kit:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Realtek
- cpe:2.3:a:realtek:xpon_software_development_kit:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Realtek
- cpe:2.3:a:realtek:xpon_software_development_kit:4.1:*:*:*:*:*:*:* Versions 4.1 Vulnerable ·Realtek
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-40740
- 2026-10-03 Alias added: GHSA-h56c-fjpj-2m9w
References
Sources
- CVE-2022-40740 · CVE Program
- CVE-2022-40740 · NVD
- FIRST EPSS
- GHSA-h56c-fjpj-2m9w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences