# CVE-2026-15141 — TP-Link Systems Inc. TL-WR820N v2

> As of 2026-08-13, CVE-2026-15141 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in TP-Link Systems Inc. TL-WR820N v2, CVSS v4.0 5.3. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-15141 as of 2026-08-13; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-13

## What is CVE-2026-15141?

The web interface of the affected device relies on the HTTP referrer header as part of request validation. Requests containing empty Referer value, or omitting the Referer header entirely, may be accepted and processed due to insufficient validation logic. Successful exploitation may allow an adjacent attacker with access to the web management interface to obtain device configuration details and other sensitive information.

The record classifies CVE-2026-15141 under weakness class [CWE-346](https://intel.threadlinqs.com/cwe/CWE-346). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 54 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 5.3 — Medium (derived from score) (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-12, last modified 2026-08-13

## Is CVE-2026-15141 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [TP-Link Systems Inc.](https://intel.threadlinqs.com/vendors/tp-link-systems): TL-WR820N v2

## How to fix CVE-2026-15141

No vendor patch reference has been recorded for CVE-2026-15141 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-2026-15141

No threat campaign in the Threadlinqs corpus currently references CVE-2026-15141, 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, NVD. Last verified by Threadlinqs on 2026-08-14. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [tp-link.com — patch](https://www.tp-link.com/kr/support/download/tl-wr820n/#Firmware)
- [tp-link.com — patch (tl wr820n)](https://www.tp-link.com/en/support/download/tl-wr820n/#Firmware)
- [tp-link.com — vendor advisory](https://www.tp-link.com/en/support/faq/5243/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-15141
Full detection coverage and IOCs for threats exploiting CVE-2026-15141 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp