CVE-2021-40546
MEDIUMCVSS 4.9/10EPSS 0.72%
Last modified
CVE-2021-40546 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/setWifi.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.
Description
Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/setWifi.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tenda | Ac6 Firmware | 02.03.01.26 |
References
- https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.mdExploit, Third Party Advisory
- https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.mdExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-40546?
Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/setWifi.
How severe is CVE-2021-40546?
CVE-2021-40546 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.
How do I fix CVE-2021-40546?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-40546?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST