Vulnerability · Published Jun 29, 2026 · Assigned by VulDB

CVE-2026-13563Edimax EW-7478APC POST Request formL2TPSetup stack-based overflow

High 8.8

In plain English

A high-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)8.8High

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 vulnerability has been found in Edimax EW-7478APC 1.04. This impacts the function formL2TPSetup of the file /goform/formL2TPSetup of the component POST Request Handler. Such manipulation of the argument L2TPUserName leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. 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:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-374571 | Edimax EW-7478APC POST Request formL2TPSetup stack-based overflow vdb-entry, technical-description
VDB-374571 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-13563 | CVE Analysis and Report third-party-advisory
Submit #844113 | EDIMAX EW-7478APC EW-7478APC 1.04 Buffer Overflow third-party-advisory
https://lavender-bicycle-a5a.notion.site/EDIMAX-EW-7478APC-formL2TPSetup-34b53a41781f80f295f8ca2aa55e1226?pvs=73 exploit