# CVE-2026-15316: Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200

> An attacker can crash the TP-Link Tapo C200 camera by sending oversized encrypted credential data, causing a 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:** 18 Aug 2026
- **Updated:** 20 Aug 2026
- **Also known as:** GHSA-5fvx-mqqx-vrm4

## What is CVE-2026-15316?

CVE-2026-15316 is a high-severity denial of service vulnerability in TP-Link Systems Inc. Tapo C200 v5, published on 18 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An improper input
validation vulnerability in the configuration service for processing encrypted
credential data has been identified in Tapo C200 v5.  An attacker can send oversized crypted
ciphertext values that may trigger exception handling failures, due to insufficient
validation, causing the affected device to crash or restart.

Successful
exploitation may temporarily disrupt HTTPS management and monitoring
functionality, resulting in a denial-of-service (DoS) condition until the
service recovers.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-15316?

It affects 1 product.


Products: Tp-Link Tapo C200 Firmware.

## How do I fix CVE-2026-15316?

No fix has been published for CVE-2026-15316 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15316 being exploited?

There is no known exploitation of CVE-2026-15316 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link Systems Inc. Tapo C200 v5

- [CVE-2021-4045](https://insights.sbomify.com/CVE-2021-4045/): TP-LINK Tapo C200 remote code execution vulnerability (critical 9.8)
- [CVE-2025-14300](https://insights.sbomify.com/CVE-2025-14300/): Unauthenticated Access to connectAP API Endpoint on Tapo C100, C200 & C425 (high 8.7)
- [CVE-2025-8065](https://insights.sbomify.com/CVE-2025-8065/): Remote Code Execution via Stack-based Buffer Overflow in ONVIF SOAP Parser in TP-Link Tapo C200 and C520WS (high 8.7)
- [CVE-2026-12760](https://insights.sbomify.com/CVE-2026-12760/): Denial-of-Service Vulnerability via Malformed IPv4 Fragmentation Handling in TP-Link Tapo C200 (high 7.1)
- [CVE-2026-1871](https://insights.sbomify.com/CVE-2026-1871/): Authenticated Stack-based Buffer Overflow in RTSP Authentication of Tapo C200 (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15316 and fix it if it is affected.

What it is: CVE-2026-15316 is a high-severity denial of service vulnerability in TP-Link Systems Inc. Tapo C200 v5, published on 18 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-2026-15316 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Tapo C200 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-2026-15316/ (Markdown: https://insights.sbomify.com/CVE-2026-15316/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15316
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15316
- OSV: https://osv.dev/vulnerability/CVE-2026-15316

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15316/
Summaries are generated and may contain mistakes; the official description above is the record.