ASUS Router Buffer Copy (No Size Check) Enables Adjacent Authenticated DoS
CVE-2026-17518 Published on October 20, 2026
Buffer Copy without Checking Size of Input in certain ASUS router models allows an adjacent authenticated user to corrupt device operations and cause a denial of service via an HTTP request with input exceeding the expected length. Refer to the ' Security Update for ASUS Router Firmware' section on the ASUS Security Advisory for more information.
Vulnerability Analysis
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-17518 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-17518
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Affected Versions
ASUS Router:- Version ASUSWRT 3.0.0.4_386 series is affected.
- Version ASUSWRT 3.0.0.4_388 series is affected.