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CVE-2021-44158

ASUS RT-AX56U Router - Stack-based buffer overflow

HIGH
8
CVSS Score
Published: January 3, 2022 at 10:10 AM UTC
Updated: June 17, 2026 at 04:11 AM UTC
2 products affected across 1 vendorRt AX56U FirmwareRt-Ax56U

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Severity
HIGH8
Exploit prediction
EPSS 0.7%

Description

ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.

Affected

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

Rt AX56U Firmware· ASUS
95%
3.0.0.4.386.44266
asus-rt-ax56u (same device)
Rt-Ax56U· ASUSdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.twcert.org.tw/tw/cp-132-5431-d23be-1.html

CVSS

8HIGHtwcert
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-121CWE-1284

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