Buffer Overflow vulnerability in Tenda AC9 V1.0 through V15.03.05.19(6318), and AC9 V3.0…
Priority MEDIUM 40CWE-120Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- 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 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Buffer Overflow vulnerability in Tenda AC9 V1.0 through V15.03.05.19(6318), and AC9 V3.0 V15.03.06.42_multi, allows attackers to execute arbitrary code via the urls parameter.
Why it matters now
EPSS 0.01148 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:tendacn:ac9_firmware:*:*:*:*:*:*:*:* | up to 15.03.06.42_multi | Vulnerable | Tendacn |
| cpe:2.3:h:tendacn:ac9:3.0:*:*:*:*:*:*:* | 3.0 | Running on | Tendacn |
| cpe:2.3:o:tendacn:ac9_firmware:*:*:*:*:*:*:*:* | up to 15.03.05.19\(6318\) | Vulnerable | Tendacn |
| cpe:2.3:h:tendacn:ac9:1.0:*:*:*:*:*:*:* | 1.0 | Running on | Tendacn |
- cpe:2.3:o:tendacn:ac9_firmware:*:*:*:*:*:*:*:* Versions up to 15.03.06.42_multi Vulnerable ·Tendacn
- cpe:2.3:h:tendacn:ac9:3.0:*:*:*:*:*:*:* Versions 3.0 Running on ·Tendacn
- cpe:2.3:o:tendacn:ac9_firmware:*:*:*:*:*:*:*:* Versions up to 15.03.05.19\(6318\) Vulnerable ·Tendacn
- cpe:2.3:h:tendacn:ac9:1.0:*:*:*:*:*:*:* Versions 1.0 Running on ·Tendacn
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31624
- 2026-10-03 Alias added: GHSA-qvhc-5474-w39h
References
More Tendacn Ac9 Firmware vulnerabilities
- TI-2023-21622 Tenda AC9 V3.0BR_V15.03.06.42_multi_TD01 was discovered stack overflow via parameter… CVSS 3.1CRITICAL 9.8
- TI-2025-20964 Tenda AC9 v15.03.05.19(6318) was discovered to contain a buffer overflow via the formWifiWpsOOB function. CVSS 3.1MEDIUM 5.9
- TI-2020-14266 Stack-based buffer overflow in Tenda AC-10U AC1200 Router… CVSS 3.1CRITICAL 9.8
- TI-2020-10504 An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0… CVSS 3.1CRITICAL 9.8
- TI-2020-10505 An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0… CVSS 3.1CRITICAL 9.8
- TI-2020-10503 An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-31624 · CVE Program
- CVE-2021-31624 · NVD
- FIRST EPSS
- GHSA-qvhc-5474-w39h · 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