High severity · published Oct 20, 2026
CVE-2026-17518
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…
8.2
CVSS
0.2%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
Router · ASUS
ASUSWRT 3.0.0.4_386 series; ASUSWRT 3.0.0.4_388 series · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-17518
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-17518
www.asus.com
https://www.asus.com/security-advisory
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