# CVE-2026-15429: Privilege Escalation via Improper Input Sanitization in TP-Link Archer VX1800v

> An authenticated user can inject newlines into configuration data to gain elevated administrative privileges on TP-Link Archer VX1800v routers.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jul 2026
- **Updated:** 15 Jul 2026
- **Also known as:** GHSA-h838-7g67-j96h

## What is CVE-2026-15429?

CVE-2026-15429 is a medium-severity vulnerability in TP-Link Systems Inc. Archer VX1800v v1, published on 14 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A privilege escalation vulnerability exists in the HTTP authentication component in Archer VX1800v v1. Improper handling of user-controlled input may allow newline characters to be injected into internally constructed configuration data. 

An
authenticated user with sufficient privileges may be able to modify account
settings and gain elevated administrative privileges.

Weakness: CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2026-15429?

It affects 1 product.


Products: Tp-Link Archer Vx1800v Firmware.

## How do I fix CVE-2026-15429?

No fix has been published for CVE-2026-15429 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15429 being exploited?

There is no known exploitation of CVE-2026-15429 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link Systems Inc. Archer VX1800v v1

- [CVE-2026-15427](https://insights.sbomify.com/CVE-2026-15427/): OS Command Injection in TR-069 (CWMP) Management Interface in TP-Link Archer VX1800v (high 8.6)
- [CVE-2026-15428](https://insights.sbomify.com/CVE-2026-15428/): OS Command Injection in TR-069 (CWMP) Management Interface in TP-Link Archer VX1800v (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15429 and fix it if it is affected.

What it is: CVE-2026-15429 is a medium-severity vulnerability in TP-Link Systems Inc. Archer VX1800v v1, published on 14 Jul 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-2026-15429 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Archer VX1800v v1. 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-2026-15429/ (Markdown: https://insights.sbomify.com/CVE-2026-15429/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15429
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15429
- OSV: https://osv.dev/vulnerability/CVE-2026-15429

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15429/
Summaries are generated and may contain mistakes; the official description above is the record.