# CVE-2026-34124: Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS

> An attacker on the adjacent network can cause a device reboot via buffer overflow in HTTP path parsing, affecting TP-Link Tapo C520WS cameras.

- **Severity:** High 7.1 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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:** 2 Apr 2026
- **Updated:** 3 Apr 2026
- **Also known as:** GHSA-9mqg-m9h5-3xhj

## What is CVE-2026-34124?

CVE-2026-34124 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. Tapo C520WS v2.6, published on 2 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces length restrictions on the raw request path but does not account for path expansion performed during normalization.  An attacker on the adjacent network may send a crafted HTTP request to cause buffer overflow and memory corruption, leading to system interruption or device reboot.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-34124?

It affects 1 product.


Products: Tp-Link Tapo C520ws Firmware.

## How do I fix CVE-2026-34124?

No fix has been published for CVE-2026-34124 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34124 being exploited?

There is no known exploitation of CVE-2026-34124 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link Systems Inc. Tapo C520WS v2.6

- [CVE-2026-34121](https://insights.sbomify.com/CVE-2026-34121/): Authentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of TP-Link Tapo C520WS (high 8.7)
- [CVE-2026-8714](https://insights.sbomify.com/CVE-2026-8714/): Denial-of-Service Vulnerability in RTSP Input Handling on TP-Link's Tapo C520WS (high 7.1)
- [CVE-2026-34118](https://insights.sbomify.com/CVE-2026-34118/): Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C100, C101, C210 & C520WS (high 7.1)
- [CVE-2026-34119](https://insights.sbomify.com/CVE-2026-34119/): Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WS (high 7.1)
- [CVE-2026-34120](https://insights.sbomify.com/CVE-2026-34120/): Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WS (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34124 and fix it if it is affected.

What it is: CVE-2026-34124 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. Tapo C520WS v2.6, published on 2 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-2026-34124 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Tapo C520WS v2.6. 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-2026-34124/ (Markdown: https://insights.sbomify.com/CVE-2026-34124/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34124
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34124
- OSV: https://osv.dev/vulnerability/CVE-2026-34124

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-34124/
Summaries are generated and may contain mistakes; the official description above is the record.