# CVE-2026-11524: Tenda W20E Web Management modifyWifiFilterRules stack-based overflow

> A remote attacker can trigger a stack-based buffer overflow in the Tenda W20E web management interface via the wifiFilterListRemark parameter, potentially leading to code execution.

- **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:** 8 Jun 2026
- **Updated:** 9 Jun 2026
- **Also known as:** GHSA-hmh7-xjhg-5rc9

## What is CVE-2026-11524?

CVE-2026-11524 is a high-severity memory corruption vulnerability in Tenda W20E, published on 8 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been found in Tenda W20E 15.11.0.6. Impacted is the function modifyWifiFilterRules of the file /goform/modifyWifiFilterRules of the component Web Management Interface. The manipulation of the argument wifiFilterListRemark leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-11524?


## How do I fix CVE-2026-11524?

No fix has been published for CVE-2026-11524 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11524 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11524 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11524 and fix it if it is affected.

What it is: CVE-2026-11524 is a high-severity memory corruption vulnerability in Tenda W20E, published on 8 Jun 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-2026-11524 exists.

Affected product: Tenda W20E. 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-2026-11524/ (Markdown: https://insights.sbomify.com/CVE-2026-11524/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11524
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11524
- OSV: https://osv.dev/vulnerability/CVE-2026-11524

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11524/
Summaries are generated and may contain mistakes; the official description above is the record.