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CVE-2021-41435

35
FAUCET Score

CVE-2021-41435 is a critical brute-force protection bypass vulnerability affecting numerous ASUS ROG Rapture and ZenWiFi router models. It allows a remote attacker to circumvent CAPTCHA protection and make unlimited login attempts by sending a specific HTTP request. With a CVSS score of 9.8, this vulnerability poses a severe risk, enabling full compromise of confidentiality, integrity, and availability without user interaction or complex attack conditions. Despite its high severity, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.0.4.386.45898CPE matchmatch criteria
cpe:2.3:o:asus:gt-ax11000_firmware:*:*:*:*:*:*:*:*
< 3.0.0.4.386.45898CPE matchmatch criteria
cpe:2.3:o:asus:rt-ax3000_firmware:*:*:*:*:*:*:*:*
< 3.0.0.4.386.45898CPE matchmatch criteria
cpe:2.3:o:asus:rt-ax55_firmware:*:*:*:*:*:*:*:*
< 3.0.0.4.386.45898CPE matchmatch criteria
cpe:2.3:o:asus:rt-ax56u_firmware:*:*:*:*:*:*:*:*
< 3.0.0.4.386.45898CPE matchmatch criteria
cpe:2.3:o:asus:rt-ax56u_v2_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.99%
Probability of exploitation in next 30 days
EPSS Percentile
92.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0599 is in the 87th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

rog.asus.com / networking/rog-rapture-gt-ax11000-model/helpdesk_bios
ProductVendor Advisory
asus.com / Networking-IoT-Servers/Whole-Home-Mesh-WiFi-System/ZenWiFi-WiFi-Systems/ASUS-ZenWiFi-AX-XT8-/HelpDesk_BIOS
ProductVendor Advisory
asus.com / Networking-IoT-Servers/Whole-Home-Mesh-WiFi-System/ZenWiFi-WiFi-Systems/ASUS-ZenWiFi-XD6/HelpDesk_BIOS
ProductVendor Advisory
asus.com / Networking-IoT-Servers/WiFi-Routers/All-series/RT-AX55/HelpDesk_BIOS
ProductVendor Advisory
asus.com / Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AX3000/HelpDesk_BIOS
ProductVendor Advisory
asus.com / Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AX56U/HelpDesk_BIOS
ProductVendor Advisory
asus.com / Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AX68U/HelpDesk_BIOS
ProductVendor Advisory