CVE-2020-26728
9.8
CRITICAL · CVSS 3.1 · EPSS 3.8% (pctl 90)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a 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 | 3.77% — more likely to be exploited than 90% of all CVEs |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2022-02-11 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| tenda | ac9 |
| tenda | ac9 firmware |
References
- https://github.com/Lyc-heng/Router/blob/main/Tenda/rce1.md
- https://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca180/routers/rce1.md
- https://github.com/Lyc-heng/routers/blob/main/routers/rce1.md
- https://github.com/Lyc-heng/Router/blob/main/Tenda/rce1.md
- https://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca180/routers/rce1.md
- https://github.com/Lyc-heng/routers/blob/main/routers/rce1.md
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