# CVE-2026-2202: Tenda AC8 httpd WifiGuestSet fromSetWifiGusetBasic buffer overflow

> A remote attacker can trigger a buffer overflow in the Tenda AC8 router's httpd service via the shareSpeed parameter, potentially leading to code execution or denial of service.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-7c2w-rcv7-7qf9

## What is CVE-2026-2202?

CVE-2026-2202 is a high-severity memory corruption vulnerability in Tenda Ac8 Firmware, published on 9 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in Tenda AC8 16.03.33.05. Affected is the function fromSetWifiGusetBasic of the file /goform/WifiGuestSet of the component httpd. The manipulation of the argument shareSpeed results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-2202?

It affects 1 product.


Products: Tenda Ac8 Firmware.

## How do I fix CVE-2026-2202?

No fix has been published for CVE-2026-2202 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2202 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2202 exists.

## Other vulnerabilities in Tenda Ac8 Firmware

- [CVE-2025-29100](https://insights.sbomify.com/CVE-2025-29100/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25663](https://insights.sbomify.com/CVE-2025-25663/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25664](https://insights.sbomify.com/CVE-2025-25664/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25667](https://insights.sbomify.com/CVE-2025-25667/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25668](https://insights.sbomify.com/CVE-2025-25668/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2202 and fix it if it is affected.

What it is: CVE-2026-2202 is a high-severity memory corruption vulnerability in Tenda Ac8 Firmware, published on 9 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2202 exists.

Affected product: Tenda Ac8 Firmware. 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-2026-2202/ (Markdown: https://insights.sbomify.com/CVE-2026-2202/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2202
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2202
- OSV: https://osv.dev/vulnerability/CVE-2026-2202

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2202/
Summaries are generated and may contain mistakes; the official description above is the record.