# CVE-2026-24111: Memory corruption in n/a

> Attackers can trigger a buffer overflow in the Tenda W20E router via the userInfo parameter, potentially leading to code execution or service disruption.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Mar 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-h4gj-g96p-mj65

## What is CVE-2026-24111?

CVE-2026-24111 is a critical memory corruption vulnerability in n/a, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the value of `userInfo`. When `userInfo` is passed into the `addAuthUser` function and processed by `sscanf` without size validation, it could lead to buffer overflow.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-24111?

It affects 1 product.


Products: Tenda W20e Firmware.

## How do I fix CVE-2026-24111?

No fix has been published for CVE-2026-24111 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-24111 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-24111 exists.

## Other vulnerabilities in n/a

- [CVE-2026-24107](https://insights.sbomify.com/CVE-2026-24107/): Command injection in n/a (critical 9.8)
- [CVE-2026-24108](https://insights.sbomify.com/CVE-2026-24108/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-24109](https://insights.sbomify.com/CVE-2026-24109/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-24110](https://insights.sbomify.com/CVE-2026-24110/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-24113](https://insights.sbomify.com/CVE-2026-24113/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-24111 and fix it if it is affected.

What it is: CVE-2026-24111 is a critical memory corruption vulnerability in n/a, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-24111 exists.

Affected product: n/a. 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-2026-24111/ (Markdown: https://insights.sbomify.com/CVE-2026-24111/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24111
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24111
- OSV: https://osv.dev/vulnerability/CVE-2026-24111

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-24111/
Summaries are generated and may contain mistakes; the official description above is the record.