# CVE-2026-15315: Unauthenticated Administrative Authentication Bypass via device_confirm Replay in TP-Link Tapo C120 and C200

> An attacker on the local network can bypass authentication to gain administrative access and cause denial of service on TP-Link Tapo cameras.

- **Severity:** High 8.7 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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:** 27 Aug 2026
- **Also known as:** GHSA-xw5g-644p-8357

## What is CVE-2026-15315?

CVE-2026-15315 is a high-severity authentication bypass vulnerability in TP-Link Systems Inc Tapo C120 v1, 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

Tapo C120 v1 and C200 v5
contain an improper authentication vulnerability within the login
authentication verification module. An attacker on the local network can
exploit weaknesses in challenge parameter validation to bypass normal
authentication controls and obtain administrative session tokens. 

Successful
exploitation may allow an attacker to subsequently execute privileged
management actions, enable unauthorized administrative access and temporary
disruption of device services, resulting in a denial-of-service (DoS)
condition.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-15315?

It affects 2 products.


Products: Tp-Link Tapo C120 Firmware, Tp-Link Tapo C200 Firmware.

## How do I fix CVE-2026-15315?

No fix has been published for CVE-2026-15315 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15315 being exploited?

There is no known exploitation of CVE-2026-15315 in the wild and no public exploit code.

Public exploit code:

- CVE-2026-15315, CVE-2026-15316 - Draft or TODO (github_poc): https://github.com/HORKimhab/CVE-2026-15315

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15315 and fix it if it is affected.

What it is: CVE-2026-15315 is a high-severity authentication bypass vulnerability in TP-Link Systems Inc Tapo C120 v1, 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-2026-15315 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc Tapo C120 v1. 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-2026-15315/ (Markdown: https://insights.sbomify.com/CVE-2026-15315/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15315
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15315
- OSV: https://osv.dev/vulnerability/CVE-2026-15315

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-15315/
Summaries are generated and may contain mistakes; the official description above is the record.