# CVE-2025-20719: Memory corruption in MT6890, MT7603, MT7615, MT7622, MT7915, MT7916, MT7981, MT7986

> A remote attacker can escalate privileges via an out-of-bounds write in MediaTek Wi-Fi AP drivers without user interaction.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-v635-vq29-xjpj

## What is CVE-2025-20719?

CVE-2025-20719 is a high-severity memory corruption vulnerability in Mediatek Software Development Kit, published on 14 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418955; Issue ID: MSV-3570.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-20719?

It affects 2 products.


Products: Mediatek Software Development Kit, Openwrt Openwrt.

## How do I fix CVE-2025-20719?

No fix has been published for CVE-2025-20719 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-20719 being exploited?

There is no known exploitation of CVE-2025-20719 in the wild and no public exploit code.

## Other vulnerabilities in Mediatek Software Development Kit

- [CVE-2025-20681](https://insights.sbomify.com/CVE-2025-20681/): Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915 (critical 9.8)
- [CVE-2025-20682](https://insights.sbomify.com/CVE-2025-20682/): Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 (critical 9.8)
- [CVE-2025-20683](https://insights.sbomify.com/CVE-2025-20683/): Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 (critical 9.8)
- [CVE-2025-20684](https://insights.sbomify.com/CVE-2025-20684/): Memory corruption in MT7615, MT7622, MT7663 (critical 9.8)
- [CVE-2025-20674](https://insights.sbomify.com/CVE-2025-20674/): Missing authorization in MT6890, MT6990, MT7915, MT7916, MT7981, MT7986, MT7990, MT7992, MT7993 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-20719 and fix it if it is affected.

What it is: CVE-2025-20719 is a high-severity memory corruption vulnerability in Mediatek Software Development Kit, published on 14 Oct 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-2025-20719 in the wild and no public exploit code.

Affected product: Mediatek Software Development Kit. 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-2025-20719/ (Markdown: https://insights.sbomify.com/CVE-2025-20719/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20719
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20719
- OSV: https://osv.dev/vulnerability/CVE-2025-20719

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-20719/
Summaries are generated and may contain mistakes; the official description above is the record.