# CVE-2026-15141: Referer Validation Bypass in TL-WR820N Web Management Interface

> An adjacent attacker can bypass Referer validation to access the web management interface and obtain sensitive device configuration details.

- **Severity:** Medium 5.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Aug 2026
- **Updated:** 13 Aug 2026
- **Also known as:** GHSA-fv83-qv7h-9c74

## What is CVE-2026-15141?

CVE-2026-15141 is a medium-severity vulnerability in TP-Link Systems Inc. TL-WR820N v2, published on 12 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2026-15141?

It affects 1 product.


Products: Tp-Link Tl-Wr820n Firmware.

## How do I fix CVE-2026-15141?

No fix has been published for CVE-2026-15141 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15141 being exploited?

There is no known exploitation of CVE-2026-15141 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link Systems Inc. TL-WR820N v2

- [CVE-2025-14175](https://insights.sbomify.com/CVE-2025-14175/): Weak Algorithm Support in SSH Server on TL-WR820N (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15141 and fix it if it is affected.

What it is: CVE-2026-15141 is a medium-severity vulnerability in TP-Link Systems Inc. TL-WR820N v2, published on 12 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-15141 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. TL-WR820N v2. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-15141/ (Markdown: https://insights.sbomify.com/CVE-2026-15141/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15141
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15141
- OSV: https://osv.dev/vulnerability/CVE-2026-15141

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15141/
Summaries are generated and may contain mistakes; the official description above is the record.