Tenda AC20 fast_setting_wifi_set sscanf buffer overflow
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
A vulnerability has been found in Tenda AC20 up to 16.03.08.12. The affected element is the function sscanf of the file /goform/fast_setting_wifi_set. The manipulation of the argument timeZone leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| Tenda | AC20 | 16.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; 16.03.08.6; 16.03.08.7; 16.03.08.8; 16.03.08.9; 16.03.08.10; 16.03.08.11; 16.03.08.12 | — | No fix listed | CNA |
- AC20 VendorTenda Affected 16.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; 16.03.08.6; 16.03.08.7; 16.03.08.8; 16.03.08.9; 16.03.08.10; 16.03.08.11; 16.03.08.12 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-11385
- 2026-10-03 Alias added: GHSA-6rgw-g4x8-jxpp
References
More Tenda Ac20 Firmware vulnerabilities
- TI-2025-13393 Tenda AC20 openSchedWifi httpd buffer overflow CVSS 4.0HIGH 8.7
- TI-2025-13392 Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer stack-based overflow CVSS 4.0HIGH 8.7
- TI-2025-13391 Tenda AC20 httpd setPptpUserList formSetPPTPUserList stack-based overflow CVSS 4.0HIGH 8.7
- TI-2025-14008 Tenda AC20 PowerSaveSet sscanf buffer overflow CVSS 4.0HIGH 8.7
- TI-2025-12122 Tenda AC20 WifiExtraSet buffer overflow CVSS 4.0HIGH 8.7
- TI-2025-09906 Tenda AC20 HTTP POST Request SetPptpServerCfg strcpy buffer overflow CVSS 4.0HIGH 8.7
Sources
- CVE-2025-11385 · CVE Program
- CVE-2025-11385 · NVD
- FIRST EPSS
- GHSA-6rgw-g4x8-jxpp · GitHub Advisory Database · CC BY 4.0
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