# CVE-2025-13553: D-Link DWR-M920 formPinManageSetup sub_41C7FC buffer overflow

> Remote attackers can trigger a buffer overflow in the D-Link DWR-M920 router via the formPinManageSetup interface, 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:** 23 Nov 2025
- **Updated:** 24 Nov 2025
- **Also known as:** GHSA-wj26-983j-mj44

## What is CVE-2025-13553?

CVE-2025-13553 is a high-severity memory corruption vulnerability in D-Link DWR-M920, published on 23 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A weakness has been identified in D-Link DWR-M920 1.1.50. This affects the function sub_41C7FC of the file /boafrm/formPinManageSetup. This manipulation of the argument submit-url causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited.

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-2025-13553?

It affects 1 product.


Products: Dlink Dwr-M920 Firmware.

## How do I fix CVE-2025-13553?

No fix has been published for CVE-2025-13553 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-13553 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13553 exists.

## Other vulnerabilities in D-Link DWR-M920

- [CVE-2025-15189](https://insights.sbomify.com/CVE-2025-15189/): D-Link DWR-M920 formDefRoute sub_464794 buffer overflow (high 8.7)
- [CVE-2025-15190](https://insights.sbomify.com/CVE-2025-15190/): D-Link DWR-M920 formFilter sub_42261C stack-based overflow (high 8.7)
- [CVE-2025-15193](https://insights.sbomify.com/CVE-2025-15193/): D-Link DWR-M920 formParentControl sub_423848 buffer overflow (high 8.7)
- [CVE-2026-10878](https://insights.sbomify.com/CVE-2026-10878/): D-Link DWR-M920 formSmsManage sub_41C8E8 command injection (medium 5.3)
- [CVE-2026-11339](https://insights.sbomify.com/CVE-2026-11339/): D-Link DWR-M920 formUSSDSetup sub_41CF20 command injection (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-13553 and fix it if it is affected.

What it is: CVE-2025-13553 is a high-severity memory corruption vulnerability in D-Link DWR-M920, published on 23 Nov 2025. 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-2025-13553 exists.

Affected product: D-Link DWR-M920. 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-2025-13553/ (Markdown: https://insights.sbomify.com/CVE-2025-13553/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-13553
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-13553
- OSV: https://osv.dev/vulnerability/CVE-2025-13553

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-13553/
Summaries are generated and may contain mistakes; the official description above is the record.