Vulnerability · Published Aug 16, 2026 · Assigned by VulDB

CVE-2026-19959Edimax EW-7478APC formWanTcpipSetup stack-based overflow

Critical 9.9

In plain English

A critical-severity stack buffer overflow in EW-7478APC from Edimax. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.8%top 43.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A weakness has been identified in Edimax EW-7478APC 1.04. This affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup. This manipulation of the argument pppUserName causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
Edimax	EW-7478APC	1.04

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-391136 | Edimax EW-7478APC formWanTcpipSetup stack-based overflow vdb-entry, technical-description
VDB-391136 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-19959 | CVE Analysis and Report third-party-advisory
Submit #872873 | EDIMAX EW-7478APC EW-7478APC 1.04 Buffer Overflow third-party-advisory
https://lavender-bicycle-a5a.notion.site/EDIMAX-EW-7478APC-formWanTcpipSetup-34b53a41781f8047b36bd11dbcaa84dc?source=copy_link exploit