CVE-2023-34359: ASUS RT-AX88U - Out-of-bounds Read - 2

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-31 · updated 2026-06-17
Weakness: CWE-125

Description

ASUS RT-AX88U's httpd is subject to an unauthenticated DoS condition. A remote attacker can send a specially crafted request to the device which causes the httpd binary to crash within the "do_json_decode()" function of ej.c, resulting in a DoS condition.

Affected products

ASUS RT-AX88U: before 3.0.0.4.388.23748 — fixed in 3.0.0.4.388.23748

How to fix

Upgrade to a fixed version: ASUS RT-AX88U 3.0.0.4.388.23748. Check the vendor advisory for mitigations.

References

https://www.twcert.org.tw/tw/cp-132-7280-bea85-1.html
https://www.twcert.org.tw/tw/cp-132-7280-bea85-1.html

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