CVE-2021-41437

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-09-26 · updated 2026-06-17
Weakness: CWE-74

Description

An HTTP response splitting attack in web application in ASUS RT-AX88U before v3.0.0.4.388.20558 allows an attacker to craft a specific URL that if an authenticated victim visits it, the URL will give access to the cloud storage of the attacker.

Affected products

ASUS RT-AX88U: before 3.0.0.4.388.20558 — fixed in 3.0.0.4.388.20558

How to fix

Upgrade to a fixed version: ASUS RT-AX88U 3.0.0.4.388.20558. Check the vendor advisory for mitigations.

References

https://github.com/efchatz/easy-exploits/tree/main/Web/ASUS/CVE-2021-41437
https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AX88U/HelpDesk_BIOS/
https://github.com/efchatz/easy-exploits/tree/main/Web/ASUS/CVE-2021-41437
https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AX88U/HelpDesk_BIOS/

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