CVE-2021-41435 json
A brute-force protection bypass in CAPTCHA protection in ASUS ROG Rapture GT-AX11000, RT-AX3000, RT-AX55, RT-AX56U, RT-AX56U_V2, RT-AX58U,…
published 2021-11-19 4 y ago modified 2026-07-09 4 mo ago also EUVD-2021-28462
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.5%
- EPSS 6.5% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
A brute-force protection bypass in CAPTCHA protection in ASUS ROG Rapture GT-AX11000, RT-AX3000, RT-AX55, RT-AX56U, RT-AX56U_V2, RT-AX58U, RT-AX82U, RT-AX82U GUNDAM EDITION, RT-AX86 Series(RT-AX86U/RT-AX86S), RT-AX86U ZAKU II EDITION, RT-AX88U, RT-AX92U, TUF Gaming AX3000, TUF Gaming AX5400 (TUF-AX5400), ASUS ZenWiFi XD6, ASUS ZenWiFi AX (XT8) before 3.0.0.4.386.45898, and RT-AX68U before 3.0.0.4.386.45911, allows a remote attacker to attempt any number of login attempts via sending a specific HTTP request.
Patch / fix
- asus gt-ax11000_firmware 3.0.0.4.386.45898
- asus rt-ax3000_firmware 3.0.0.4.386.45898
- asus rt-ax55_firmware 3.0.0.4.386.45898
- asus rt-ax56u_firmware 3.0.0.4.386.45898
- asus rt-ax56u_v2_firmware 3.0.0.4.386.45898
- asus rt-ax58u_firmware 3.0.0.4.386.45898
- asus rt-ax82u_firmware 3.0.0.4.386.45898
- asus rt-ax82u_gundam_edition_firmware 3.0.0.4.386.45898
- asus rt-ax86u_firmware 3.0.0.4.386.45898
- asus rt-ax86s_firmware 3.0.0.4.386.45898
- asus rt-ax86u_zaku_ii_edition_firmware 3.0.0.4.386.45898
- asus rt-ax88u_firmware 3.0.0.4.386.45898
- asus rt-ax92u_firmware 3.0.0.4.386.45898
- asus tuf_gaming_ax3000_firmware 3.0.0.4.386.45898
- asus tuf-ax5400_firmware 3.0.0.4.386.45898
- asus zenwifi_xd6_firmware 3.0.0.4.386.45898
- asus zenwifi_ax_(xt8)_firmware 3.0.0.4.386.45898
- asus rt-ax68u_firmware 3.0.0.4.386.45911
Exploit prediction
6.49% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
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-307 Improper Restriction of Excessive Authentication Attempts
References
-
asus.com
/Networking-IoT-Servers/Whole-Home-Mesh-WiFi-System/ZenWiFi-WiFi-Systems/ASUS-ZenWiFi-AX-XT8-/HelpDesk_BIOS/
product, vendor-advisory
-
rog.asus.com
/networking/rog-rapture-gt-ax11000-model/helpdesk_bios
product, vendor-advisory
-
asus.com
/Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AX3000/HelpDesk_BIOS/
product, vendor-advisory
-
asus.com
/Networking-IoT-Servers/WiFi-Routers/All-series/RT-AX55/HelpDesk_BIOS/
product, vendor-advisory
-
asus.com
/Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AX56U/HelpDesk_BIOS/
product, vendor-advisory
-
asus.com
/Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AX68U/HelpDesk_BIOS/
product, vendor-advisory
-
asus.com
/Networking-IoT-Servers/Whole-Home-Mesh-WiFi-System/ZenWiFi-WiFi-Systems/ASUS-ZenWiFi-XD6/HelpDesk_BIOS/
product, vendor-advisory
Sources
- CVE List CVE-2021-41435
- NVD CVE-2021-41435
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.