# CVE-2021-28937: Information disclosure in n/a

> An attacker can intercept HTTP traffic to the web interface and read the administrator password in plaintext, leading to full device compromise.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Mar 2021
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-qc4c-hg95-vjcg

## What is CVE-2021-28937?

CVE-2021-28937 is a high-severity vulnerability in n/a, published on 29 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The /password.html page of the Web management interface of the Acexy Wireless-N WiFi Repeater REV 1.0 (28.08.06.1) contains the administrator account password in plaintext. The page can be intercepted on HTTP.

Weakness: CWE-312 (Cleartext Storage of Sensitive Information)

## Which versions are affected by CVE-2021-28937?

It affects 1 product.


Products: Acexy Wireless-N Wifi Repeater Firmware.

## How do I fix CVE-2021-28937?

No fix has been published for CVE-2021-28937 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28937 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-28937 exists.

Public exploit code:

- Acexy Wireless-N WiFi Repeater REV 1.0 - Repeater Password Disclosure (nuclei): http/cves/2021/CVE-2021-28937.yaml

## Other vulnerabilities in n/a

- [CVE-2021-28936](https://insights.sbomify.com/CVE-2021-28936/): Auth bypass in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28937 and fix it if it is affected.

What it is: CVE-2021-28937 is a high-severity vulnerability in n/a, published on 29 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-28937 exists.

Affected product: n/a. 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-2021-28937/ (Markdown: https://insights.sbomify.com/CVE-2021-28937/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28937
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28937
- OSV: https://osv.dev/vulnerability/CVE-2021-28937

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28937/
Summaries are generated and may contain mistakes; the official description above is the record.