CVE-2018-8879

9.8 criticalEPSS 17%

Critical (9.8) in asus rt-ac66u firmware. EPSS 17% chance of exploitation in the next 30 days.

Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 17% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2019-11-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

asus:rt-ac66u_firmware

References

https://pagedout.institute/download/PagedOut_001_beta1.pdf
https://www.asus.com/Networking/RTAC66U/HelpDesk_BIOS
https://pagedout.institute/download/PagedOut_001_beta1.pdf
https://www.asus.com/Networking/RTAC66U/HelpDesk_BIOS

Check your stack JSON