CVE-2021-40546 json
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 cra…
published 2023-09-05 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27721
- cvss
- 4.9
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
Affected products
- tenda ac6
Classification
- Weakness
-
- CWE-404 Improper Resource Shutdown or Release
References
-
github.com
/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.md
exploit, third-party-advisory
Sources
- CVE List CVE-2021-40546
- NVD CVE-2021-40546
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.