# CVE-2025-27521: Missing authorization in HarmonyOS

> Improper access permissions in HarmonyOS process management allow attackers to compromise service confidentiality.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N`)
- **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:** 4 Mar 2025
- **Updated:** 18 Sep 2025
- **Also known as:** GHSA-r8mv-whv9-j8cj

## What is CVE-2025-27521?

CVE-2025-27521 is a medium-severity missing authorization vulnerability in Huawei Harmonyos, published on 4 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Vulnerability of improper access permission in the process management module
Impact: Successful exploitation of this vulnerability may affect service confidentiality.

Weakness: CWE-276 (Incorrect Default Permissions), CWE-280 (Improper Handling of Insufficient Permissions or Privileges)

## Which versions are affected by CVE-2025-27521?

It affects 1 product.


Products: Huawei Harmonyos.

## How do I fix CVE-2025-27521?

No fix has been published for CVE-2025-27521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27521 being exploited?

There is no known exploitation of CVE-2025-27521 in the wild and no public exploit code.

## Other vulnerabilities in Huawei Harmonyos

- [CVE-2026-34865](https://insights.sbomify.com/CVE-2026-34865/): Memory corruption in HarmonyOS (critical 10.0)
- [CVE-2023-34157](https://insights.sbomify.com/CVE-2023-34157/): Other in HarmonyOS (critical 10.0)
- [CVE-2023-41294](https://insights.sbomify.com/CVE-2023-41294/): Denial of service in HarmonyOS (critical 9.8)
- [CVE-2022-48478](https://insights.sbomify.com/CVE-2022-48478/): Denial of service in HarmonyOS (critical 9.8)
- [CVE-2022-48479](https://insights.sbomify.com/CVE-2022-48479/): Memory corruption in HarmonyOS (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27521 and fix it if it is affected.

What it is: CVE-2025-27521 is a medium-severity missing authorization vulnerability in Huawei Harmonyos, published on 4 Mar 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-2025-27521 in the wild and no public exploit code.

Affected product: Huawei Harmonyos. 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-2025-27521/ (Markdown: https://insights.sbomify.com/CVE-2025-27521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27521
- OSV: https://osv.dev/vulnerability/CVE-2025-27521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27521/
Summaries are generated and may contain mistakes; the official description above is the record.