# CVE-2026-11553: Tenda HG7/HG9/HG10 formPPPEdit stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in Tenda HG7/HG9/HG10 routers via the formPPPEdit function, 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:** 2 Oct 2026
- **Also known as:** GHSA-wf5q-f55f-rq8w

## What is CVE-2026-11553?

CVE-2026-11553 is a high-severity memory corruption vulnerability in Tenda HG10, 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 was found in Tenda HG7, HG9 and HG10 300001138_en_xpon. This affects the function formPPPEdit of the file /boaform/formPPPEdit. The manipulation of the argument encodename results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could 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-2026-11553?


## How do I fix CVE-2026-11553?

No fix has been published for CVE-2026-11553 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11553 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11553 exists.

Public exploit code:

- Patch: Authentication bypass (VMware vCenter) (github_poc): https://github.com/gduma-phData/patch-CVE-2026-11553

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11553 and fix it if it is affected.

What it is: CVE-2026-11553 is a high-severity memory corruption vulnerability in Tenda HG10, 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-2026-11553 exists.

Affected product: Tenda HG10. 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-2026-11553/ (Markdown: https://insights.sbomify.com/CVE-2026-11553/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11553
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11553
- OSV: https://osv.dev/vulnerability/CVE-2026-11553

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11553/
Summaries are generated and may contain mistakes; the official description above is the record.