# CVE-2026-19961 — Edimax EW-7478APC

> As of 2026-08-17, CVE-2026-19961 is a CRITICAL-severity vulnerability in Edimax EW-7478APC, CVSS v3.1 9.9, EPSS 0.4% (38.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-19961 as of 2026-08-17; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-17

## What is CVE-2026-19961?

A vulnerability was detected in Edimax EW-7478APC 1.04. Affected is the function formWlSiteSurvey of the file /goform/formWlSiteSurvey. Performing a manipulation of the argument selSSID results in buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record classifies CVE-2026-19961 under weakness classes [CWE-120](https://intel.threadlinqs.com/cwe/CWE-120), [CWE-119](https://intel.threadlinqs.com/cwe/CWE-119). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 50 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.9 — CRITICAL (`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`)
- **CVSS v4.0 base score:** 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 38.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-16, last modified 2026-08-17

## Is CVE-2026-19961 being exploited?

It currently carries a trending score of 39 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Edimax**: EW-7478APC

## How to fix CVE-2026-19961

No vendor patch reference has been recorded for CVE-2026-19961 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-19961

No threat campaign in the Threadlinqs corpus currently references CVE-2026-19961, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-08-17.

**Exploit and proof of concept**

- [lavender-bicycle-a5a.notion.site — exploit](https://lavender-bicycle-a5a.notion.site/EDIMAX-EW-7478APC-formWlSiteSurvey-34b53a41781f804fb328d87416095401?source=copy_link)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/391138)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/391138/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-19961)
- [vuldb.com — third party advisory (872875)](https://vuldb.com/submit/872875)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-19961
Full detection coverage and IOCs for threats exploiting CVE-2026-19961 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp