Vulnerability · Published May 25, 2026 · Assigned by VulDB

CVE-2026-9459Edimax EW-7438RPn formConnectionSetting stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in EW-7438RPn 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 55% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.8%top 44.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security flaw has been discovered in Edimax EW-7438RPn 1.31. This affects the function formConnectionSetting of the file /goform/formConnectionSetting. Performing a manipulation of the argument max_Conn/timeOut results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been released to the public and may 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-7438RPn	1.31

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-365440 | Edimax EW-7438RPn formConnectionSetting stack-based overflow vdb-entry, technical-description
VDB-365440 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #813896 | Edimax EW-7438RPn 1.31 Stack-based Buffer Overflow third-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/Edimax/vuln_12/12.md exploit