CVE-2021-41436

HIGH
7.5
CVSS Score
Published: November 19, 2021 at 11:14 AM UTC
Updated: July 9, 2026 at 01:17 AM UTC
36 products affected across 1 vendorRt AX55 FirmwareRt AX88U FirmwareRt AX56U Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 5%

Description

An HTTP request smuggling in web application 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 unauthenticated attacker to DoS via sending a specially crafted HTTP packet.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
asus-gt-ax11000 (same device)
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
asus-rt-ax3000 (same device)
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
asus-rt-ax56u (same device)
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
v < 3.0.0.4.386.45911
Affected range stops below 3.0.0.4.386.45911, so it looks safe — our inference, not a vendor statement
asus-rt-ax68u (same device)
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
asus-rt-ax82u (same device)
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
asus-rt-ax82u-gundam-edition (same device)
v < 3.0.0.4.386.45898
Affected range stops below 3.0.0.4.386.45898, so it looks safe — our inference, not a vendor statement
asus-rt-ax86s (same device)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-444

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