# CVE-2020-26141: Security feature bypass in n/a

> Attackers can bypass TKIP integrity checks to inject or decrypt packets on WPA/WPA2 networks using vulnerable ALFA Wi-Fi drivers.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/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:** Yes
- **Published:** 11 May 2021
- **Updated:** 14 Apr 2026
- **Also known as:** 2869483, A-177911676, ASB-A-177911676, DEBIAN-CVE-2020-26141, GHSA-mq8v-785f-4pmx, UBUNTU-CVE-2020-26141

## What is CVE-2020-26141?

CVE-2020-26141 is a medium-severity vulnerability in n/a, published on 11 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol.

Weakness: CWE-354 (Improper Validation of Integrity Check Value)

## Which versions are affected by CVE-2020-26141?

It affects 95 products.


Products: Alfa Awus036h Firmware, Cisco Ip Conference Phone 8832 Firmware, Cisco Ip Phone 6861 Firmware, Cisco Ip Phone 8861 Firmware, Cisco Ip Phone 8865 Firmware, Cisco Meraki Gr10 Firmware, Cisco Meraki Gr60 Firmware, Cisco Meraki Mr12 Firmware, Cisco Meraki Mr18 Firmware, Cisco Meraki Mr20 Firmware, Cisco Meraki Mr26 Firmware, Cisco Meraki Mr30h Firmware, Cisco Meraki Mr32 Firmware, Cisco Meraki Mr33 Firmware, Cisco Meraki Mr34 Firmware, Cisco Meraki Mr36 Firmware, Cisco Meraki Mr42 Firmware, Cisco Meraki Mr42e Firmware, Cisco Meraki Mr44 Firmware, Cisco Meraki Mr45 Firmware and 75 more.

## How do I fix CVE-2020-26141?

Apply the vendor's patch.

## Is CVE-2020-26141 being exploited?

There is no known exploitation of CVE-2020-26141 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-26140](https://insights.sbomify.com/CVE-2020-26140/): Security feature bypass in n/a (medium 6.5)
- [CVE-2020-26143](https://insights.sbomify.com/CVE-2020-26143/): Security feature bypass in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-26141 and fix it if it is affected.

What it is: CVE-2020-26141 is a medium-severity vulnerability in n/a, published on 11 May 2021. 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-2020-26141 in the wild and no public exploit code.

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-2020-26141/ (Markdown: https://insights.sbomify.com/CVE-2020-26141/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-26141
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-26141
- OSV: https://osv.dev/vulnerability/CVE-2020-26141

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-26141/
Summaries are generated and may contain mistakes; the official description above is the record.