Tenda g1 Firmware vulnerabilities

5 CVEs affecting Tenda g1 Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-70802, published 2026-03-10.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2021-27705, published 2021-04-14. Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days. Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the…
• CVE-2021-27707, published 2021-04-14. Critical severity, CVSS 9.8. EPSS: 2.8% chance of exploitation in the next 30 days. Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"portMappingIndex "request. This occurs because…
• CVE-2021-27706, published 2021-04-14. Critical severity, CVSS 9.8. EPSS: 2.8% chance of exploitation in the next 30 days. Buffer Overflow in Tenda G1 and G3 routers with firmware version V15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"IPMacBindIndex "request. This occurs…
• CVE-2025-8980, published 2025-08-14. Medium severity, CVSS 6.6. EPSS: 0.4% chance of exploitation in the next 30 days. A vulnerability has been found in Tenda G1 16.01.7.8(3660). Affected by this issue is the function check_upload_file of the component Firmware Update Handler. The manipulation leads to insufficient…
• CVE-2025-70802, published 2026-03-10. High severity, CVSS 8.4. EPSS: 0.2% chance of exploitation in the next 30 days. Tenda G1V3.1si V16.01.7.8 Firmware V16.01.7.8 was discovered to contain a hardcoded password vulnerability in /etc_ro/shadow, which allows attackers to log in as root.