# CVE-2021-26687: Security feature bypass in n/a

> Attackers can bypass hostname verification in LG preloaded apps on Android, potentially enabling man-in-the-middle attacks.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-2w55-f536-w4g7

## What is CVE-2021-26687?

CVE-2021-26687 is a critical vulnerability in Google Android, published on 4 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on LG mobile devices with Android OS 8.0, 8.1, 9.0, and 10 software. In preloaded applications, the HostnameVerified default is mishandled. The LG ID is LVE-SMP-200029 (February 2021).

## Which versions are affected by CVE-2021-26687?

It affects 1 product.


Products: Google Android.

## How do I fix CVE-2021-26687?

No fix has been published for CVE-2021-26687 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26687 being exploited?

There is no known exploitation of CVE-2021-26687 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-2021-26687 and fix it if it is affected.

What it is: CVE-2021-26687 is a critical vulnerability in Google Android, published on 4 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-26687 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-2021-26687/ (Markdown: https://insights.sbomify.com/CVE-2021-26687/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26687
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26687
- OSV: https://osv.dev/vulnerability/CVE-2021-26687

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26687/
Summaries are generated and may contain mistakes; the official description above is the record.