# CVE-2026-105284: Totolink A3002MU Authentication Check boa sub_40FCFC improper authorization

> Remote attackers can bypass authentication checks in the Totolink A3002MU router's boa web server, gaining unauthorized access.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-pjpq-5r9w-r525

## What is CVE-2026-105284?

CVE-2026-105284 is a critical missing authorization vulnerability in Totolink A3002MU, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A weakness has been identified in Totolink A3002MU 1.0.0-B20230403.1455. The impacted element is the function sub_40FCFC of the file /bin/boa of the component Authentication Check. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Weakness: CWE-285 (Improper Authorization), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-105284?


## How do I fix CVE-2026-105284?

No fix has been published for CVE-2026-105284 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-105284 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105284 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-105284 and fix it if it is affected.

What it is: CVE-2026-105284 is a critical missing authorization vulnerability in Totolink A3002MU, published on 5 Oct 2026. 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-2026-105284 exists.

Affected product: Totolink A3002MU. 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-2026-105284/ (Markdown: https://insights.sbomify.com/CVE-2026-105284/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-105284
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-105284
- OSV: https://osv.dev/vulnerability/CVE-2026-105284

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-105284/
Summaries are generated and may contain mistakes; the official description above is the record.