# CVE-2026-1871: Authenticated Stack-based Buffer Overflow in RTSP Authentication of Tapo C200

> An authenticated attacker can cause a denial of service on TP-Link Tapo C200 cameras by triggering a stack-based buffer overflow in RTSP authentication.

- **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 Jun 2026
- **Updated:** 2 Jun 2026
- **Also known as:** GHSA-92jw-rf4g-rwr2

## What is CVE-2026-1871?

CVE-2026-1871 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. Tapo C200 v5, published on 2 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

TP-Link Tapo C200 v5 contains a stack-based buffer overflow flaw in RTSP authentication handling due to improper validation of Authorization header field lengths, which can be triggered by a crafted authentication request.

Successful exploitation causes the affected RTSP core service process to crash and triggers an automatic system reboot, resulting in a denial of service (DoS) condition.  This prevents legitimate users from accessing the camera’s live video stream or management interface until the service restarts.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-1871?

It affects 1 product.


Products: Tp-Link Tapo C200 Firmware.

## How do I fix CVE-2026-1871?

No fix has been published for CVE-2026-1871 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1871 being exploited?

There is no known exploitation of CVE-2026-1871 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-2026-15316](https://insights.sbomify.com/CVE-2026-15316/): Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200 (high 7.1)
- [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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1871 and fix it if it is affected.

What it is: CVE-2026-1871 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. Tapo C200 v5, published on 2 Jun 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-2026-1871 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-2026-1871/ (Markdown: https://insights.sbomify.com/CVE-2026-1871/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1871
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1871
- OSV: https://osv.dev/vulnerability/CVE-2026-1871

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1871/
Summaries are generated and may contain mistakes; the official description above is the record.