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Vulnerability record · CVE-2026-19386 · published 7 October 2026

CVE-2026-19386: Stack-based buffer overflow vulnerability

A stack-based buffer overflow in the ASUS router modules allows an authenticated nearby user to execute arbitrary code via a crafted configuration file upload that exceeds the expected buffer size.Refer to the ' Security Update for ASUS Router Firmware  ' section on the ASUS Security Advisory for more information.

9.3 CVSS 4.0 Critical EPSS 0.19% · top 91.8% CWE-121 · Stack-based buffer overflow Deferred
9.3CVSS 4.0 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
8 Oct 2026Last modified by NVD

Description

A stack-based buffer overflow in the ASUS router modules allows an authenticated nearby user to execute arbitrary code via a crafted configuration file upload that exceeds the expected buffer size.Refer to the ' Security Update for ASUS Router Firmware  ' section on the ASUS Security Advisory for more information.

CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.asus.com/security-advisory

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Source: NIST National Vulnerability Database (record CVE-2026-19386), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.