CVE-2021-31758 json
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN.
published 2021-05-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18642
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.6%
- EPSS 6.6% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setportList allows attackers to execute arbitrary code on the system via a crafted post request.
Exploit prediction
6.62% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_2
exploit, issue-tracking, third-party-advisory
Sources
- CVE List CVE-2021-31758
- NVD CVE-2021-31758
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.