Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-41436

28
FAUCET Score

CVE-2021-41436 describes an HTTP request smuggling vulnerability affecting numerous ASUS ROG and ZenWiFi router models, including the GT-AX11000 and RT-AX88U, in firmware versions prior to 3.0.0.4.386.45898 or 3.0.0.4.386.45911. This flaw allows an unauthenticated remote attacker to trigger a Denial of Service (DoS) by sending a specially crafted HTTP packet. With a CVSS score of 7.5 (High), the vulnerability has a low attack complexity and requires no user interaction, making it easily exploitable for impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage 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

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.57%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0457 is in the 83rd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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