# CVE-2023-2626: Authentication Bypass in OpenThread Boarder Router devices

> Unauthenticated attackers can bypass security checks to send arbitrary IPv6 packets to devices on the local network via OpenThread border routers.

- **Severity:** High 7.5 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Jul 2023
- **Updated:** 2 Aug 2024

## What is CVE-2023-2626?

CVE-2023-2626 is a high-severity authentication bypass vulnerability in Google Wifi (next gen), published on 25 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

There exists an authentication bypass vulnerability in OpenThread border router devices and implementations. This issue allows unauthenticated nodes to craft radio frames using “Key ID Mode 2”: a special mode using a static encryption key to bypass security checks, resulting in arbitrary IP packets being allowed on the Thread network.
 This provides a pathway for an attacker to send/receive arbitrary IPv6 packets to devices on the LAN, potentially exploiting them if they lack additional authentication or contain any network vulnerabilities that would normally be mitigated by the home router’s NAT firewall. Effected devices have been mitigated through an automatic update beyond the affected range.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2023-2626?

It affects 5 products.


Products: Google Nest Hub Firmware, Google Nest Hub Max Firmware, Google Nest Wifi 6e Firmware, Google Nest Wifi Point Firmware, Google Wifi Firmware.

## How do I fix CVE-2023-2626?

No fix has been published for CVE-2023-2626 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-2626 being exploited?

There is no known exploitation of CVE-2023-2626 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2626 and fix it if it is affected.

What it is: CVE-2023-2626 is a high-severity authentication bypass vulnerability in Google Wifi (next gen), published on 25 Jul 2023. 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-2023-2626 in the wild and no public exploit code.

Affected product: Google Wifi (next gen). 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-2023-2626/ (Markdown: https://insights.sbomify.com/CVE-2023-2626/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2626
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2626
- OSV: https://osv.dev/vulnerability/CVE-2023-2626

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2626/
Summaries are generated and may contain mistakes; the official description above is the record.