CVE-2021-31755 KEV
9.8
CRITICAL · CVSS 3.1 · EPSS 86.9% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2021-11-17.
Description
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 86.89% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | yes — remediate by 2021-11-17 |
| Public exploit | none known |
| Published | 2021-05-07 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Tenda AC11 Router Stack Buffer Overflow Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2021-11-17 |
| Vendor / product | Tenda / AC11 Router |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| tenda | ac11 |
| tenda | ac11 firmware |
References
→ the Explorer · watch your stack · NVD