# CVE-2026-30814: Buffer Overflow Vulnerability in TP-Link AX53

> An authenticated adjacent attacker can trigger a stack-based buffer overflow in TP-Link Archer AX53 routers, potentially executing arbitrary code or causing a crash.

- **Severity:** High 7.3 (`CVSS:4.0/AV:A/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Apr 2026
- **Updated:** 7 May 2026
- **Also known as:** GHSA-w4qp-mpq3-cw45

## What is CVE-2026-30814?

CVE-2026-30814 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. AX53 v1.0, published on 8 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A stack-based buffer overflow in the tmpServer module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to trigger a segmentation fault and potentially execute arbitrary code via a specially crafted configuration file. Successful exploitation may cause a crash and could allow arbitrary code execution, enabling modification of device state, exposure of sensitive data, or further compromise of device integrity.

This issue affects AX53 v1.0: before 1.7.1 Build 20260213.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-30814?

It affects 1 product.


Products: Tp-Link Archer Ax53 Firmware.

## How do I fix CVE-2026-30814?

No fix has been published for CVE-2026-30814 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-30814 being exploited?

There is no known exploitation of CVE-2026-30814 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link Systems Inc. AX53 v1.0

- [CVE-2025-62673](https://insights.sbomify.com/CVE-2025-62673/): Heap-based Buffer Overflow Vulnerability in Archer AX53 and AX12 (high 8.6)
- [CVE-2026-30815](https://insights.sbomify.com/CVE-2026-30815/): OS Command Injection Vulnerability in OpenVPN Module in TP-Link AX53 (high 8.5)
- [CVE-2026-30818](https://insights.sbomify.com/CVE-2026-30818/): OS Command Injection Vulnerability in dnsmasq Module in TP-Link AX53 (high 8.5)
- [CVE-2025-15608](https://insights.sbomify.com/CVE-2025-15608/): Buffer Overflow in Network Probe Handling Function of TP-Link Archer AX53 + Archer AX55 (high 7.7)
- [CVE-2025-15607](https://insights.sbomify.com/CVE-2025-15607/): Authenticated Command Injection in mcsd Service of TP-Link Archer AX53 (high 7.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30814 and fix it if it is affected.

What it is: CVE-2026-30814 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. AX53 v1.0, published on 8 Apr 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-2026-30814 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. AX53 v1.0. 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-2026-30814/ (Markdown: https://insights.sbomify.com/CVE-2026-30814/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30814
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30814
- OSV: https://osv.dev/vulnerability/CVE-2026-30814

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-30814/
Summaries are generated and may contain mistakes; the official description above is the record.