CVE-2020-26728 — CRITICAL (9.8)

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tenda	Ac9 Firmware	15.03.06.42_multi
Tenda	Ac9	3.0

References

https://github.com/Lyc-heng/Router/blob/main/Tenda/rce1.mdBroken Link
https://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca18ExploitThird Party Advisory
https://github.com/Lyc-heng/routers/blob/main/routers/rce1.mdExploitThird Party Advisory
https://github.com/Lyc-heng/Router/blob/main/Tenda/rce1.mdBroken Link
https://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca18ExploitThird Party Advisory
https://github.com/Lyc-heng/routers/blob/main/routers/rce1.mdExploitThird Party Advisory

FAQ

What is CVE-2020-26728?

CVE-2020-26728 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 t...

How severe is CVE-2020-26728?

CVE-2020-26728 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2020-26728?

Check the references section above for vendor advisories and patch information. Affected products include: Tenda Ac9 Firmware, Tenda Ac9.