Stack-based Buffer Overflow in ASUS Router Firmware
CVE-2026-84730

8.7HIGH

Key Information:

Vendor

Asus
Status
Router Firmware
Vendor
CVE Published:
4 November 2026

What is CVE-2026-84730?

A stack-based buffer overflow vulnerability exists within certain versions of ASUS Router firmware. This issue enables an unauthenticated nearby attacker to potentially execute arbitrary commands with root privileges by sending a maliciously crafted device name. Users of affected ASUS Router models are strongly advised to consult the ASUS Security Advisory for detailed instructions on mitigating this vulnerability through firmware updates.

Affected Version(s)

Router firmware ASUSWRT 3.0.0.4_386 series

Router firmware ASUSWRT 3.0.0.4_388 series

Router firmware ASUSWRT 3.0.0.6_102 series

References

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

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Klein András
.