# CVE-2026-0918: Null Pointer Dereference in Tapo SmartCam HTTP Service on TP-Link Tapo C220 & C520WS

> Unauthenticated attackers can crash the HTTP service on TP-Link Tapo cameras via large Content-Length headers, causing temporary denial of service.

- **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:** 27 Jan 2026
- **Updated:** 29 Apr 2026
- **Also known as:** GHSA-ffwx-rgqv-xv4m

## What is CVE-2026-0918?

CVE-2026-0918 is a high-severity vulnerability in TP-Link Systems Inc. Tapo C100 v5, published on 27 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Tapo C100 v5, C220 v1 and C520WS v2 cameras’ HTTP service does not safely handle POST requests containing an excessively large Content-Length header. The resulting failed memory allocation triggers a NULL pointer dereference, causing the main service process to crash. An unauthenticated attacker can repeatedly crash the service, causing temporary denial of service. The device restarts automatically, and repeated requests can keep it unavailable.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2026-0918?

It affects 2 products.


Products: Tp-Link Tapo C220 Firmware, Tp-Link Tapo C520ws Firmware.

## How do I fix CVE-2026-0918?

No fix has been published for CVE-2026-0918 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0918 being exploited?

There is no known exploitation of CVE-2026-0918 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link Systems Inc. Tapo C100 v5

- [CVE-2026-0919](https://insights.sbomify.com/CVE-2026-0919/): Unauthenticated Denial of Service via Oversized URL in HTTP Parser on TP-Link Tapo C210, C220 & C520WS (high 7.1)
- [CVE-2026-1315](https://insights.sbomify.com/CVE-2026-1315/): Unauthenticated Denial of Service via Firmware Update Endpoint on TP-Link Tapo C220 & C520WS (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0918 and fix it if it is affected.

What it is: CVE-2026-0918 is a high-severity vulnerability in TP-Link Systems Inc. Tapo C100 v5, published on 27 Jan 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-2026-0918 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Tapo C100 v5. 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-2026-0918/ (Markdown: https://insights.sbomify.com/CVE-2026-0918/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0918
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0918
- OSV: https://osv.dev/vulnerability/CVE-2026-0918

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0918/
Summaries are generated and may contain mistakes; the official description above is the record.