# CVE-2021-25480: Denial of service in Samsung Mobile Devices

> Remote attackers can cause denial of service on mobile network connections via replay attacks in Qualcomm modem firmware.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-vxfp-73r7-qww7

## What is CVE-2021-25480?

CVE-2021-25480 is a medium-severity denial of service vulnerability in Google Android, published on 6 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A lack of replay attack protection in GUTI REALLOCATION COMMAND message process in Qualcomm modem prior to SMR Oct-2021 Release 1 can lead to remote denial of service on mobile network connection.

Weakness: CWE-294 (Authentication Bypass by Capture-replay)

## Which versions are affected by CVE-2021-25480?

It affects 1 product.


Products: Google Android.

## How do I fix CVE-2021-25480?

No fix has been published for CVE-2021-25480 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25480 being exploited?

There is no known exploitation of CVE-2021-25480 in the wild and no public exploit code.

## Other vulnerabilities in Google Android

- [CVE-2026-58704](https://insights.sbomify.com/CVE-2026-58704/): Google Pixel Improper Authorization (high 8.8, exploited in the wild)
- [CVE-2025-48543](https://insights.sbomify.com/CVE-2025-48543/): Android Runtime Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2023-35674](https://insights.sbomify.com/CVE-2023-35674/): Android Framework Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2025-48595](https://insights.sbomify.com/CVE-2025-48595/): Android Framework Integer Overflow (high 8.4, exploited in the wild)
- [CVE-2024-32896](https://insights.sbomify.com/CVE-2024-32896/): Android Pixel Privilege Escalation (high 8.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25480 and fix it if it is affected.

What it is: CVE-2021-25480 is a medium-severity denial of service vulnerability in Google Android, published on 6 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-25480 in the wild and no public exploit code.

Affected product: Google Android. 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-2021-25480/ (Markdown: https://insights.sbomify.com/CVE-2021-25480/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25480
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25480
- OSV: https://osv.dev/vulnerability/CVE-2021-25480

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25480/
Summaries are generated and may contain mistakes; the official description above is the record.