CVE-2021-27691
9.8
CRITICAL · CVSS 3.1 · EPSS 25.2% (pctl 98)
Patch early
EPSS 25.2% — above the 10% action threshold.
Description
Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted action/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 25.18% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-78 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-04-16 |
| Last modified | 2026-06-17 |
Affected (6)
| Vendor | Product |
|---|---|
| tendacn | g0 |
| tendacn | g0 firmware |
| tendacn | g1 |
| tendacn | g1 firmware |
| tendacn | g3 |
| tendacn | g3 firmware |
References
→ the Explorer · watch your stack · NVD