# CVE-2025-20676: Null dereference in MT7902, MT7921, MT7922, MT7925, MT7927

> A local attacker can cause a system crash in MediaTek Wi-Fi drivers due to an uncaught exception, requiring user privileges but no interaction.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Jun 2025
- **Updated:** 3 Jun 2025
- **Also known as:** GHSA-v7wr-69gh-4wh3

## What is CVE-2025-20676?

CVE-2025-20676 is a medium-severity vulnerability in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927, published on 2 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In wlan STA driver, there is a possible system crash due to an uncaught exception. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00412240; Issue ID: MSV-3293.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-20676?

It affects 1 product.


Products: Mediatek Nbiot Sdk.

## How do I fix CVE-2025-20676?

No fix has been published for CVE-2025-20676 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-20676 being exploited?

There is no known exploitation of CVE-2025-20676 in the wild and no public exploit code.

## Other vulnerabilities in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927

- [CVE-2025-20680](https://insights.sbomify.com/CVE-2025-20680/): Memory corruption in MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 (critical 9.8)
- [CVE-2022-26437](https://insights.sbomify.com/CVE-2022-26437/): Memory corruption in MT2621, MT2625 (critical 9.8)
- [CVE-2026-20407](https://insights.sbomify.com/CVE-2026-20407/): Memory corruption in MediaTek chipset (critical 9.3)
- [CVE-2026-20423](https://insights.sbomify.com/CVE-2026-20423/): Memory corruption in MediaTek chipset (high 7.8)
- [CVE-2026-20436](https://insights.sbomify.com/CVE-2026-20436/): Memory corruption in MediaTek chipset (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-20676 and fix it if it is affected.

What it is: CVE-2025-20676 is a medium-severity vulnerability in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927, published on 2 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-20676 in the wild and no public exploit code.

Affected product: MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927. 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-2025-20676/ (Markdown: https://insights.sbomify.com/CVE-2025-20676/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20676
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20676
- OSV: https://osv.dev/vulnerability/CVE-2025-20676

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-20676/
Summaries are generated and may contain mistakes; the official description above is the record.