# CVE-2025-2764: CarlinKit CPC200-CCPA update.cgi Improper Verification of Cryptographic Signature Code Execution Vulnerability

> Network-adjacent attackers can bypass authentication and execute arbitrary code as root due to improper cryptographic signature verification in update.cgi.

- **Severity:** High 8.0 (`CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Apr 2025
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-mxxr-2fvg-xw43

## What is CVE-2025-2764?

CVE-2025-2764 is a high-severity vulnerability in CarlinKit CPC200-CCPA, published on 23 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

CarlinKit CPC200-CCPA update.cgi Improper Verification of Cryptographic Signature Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of CarlinKit CPC200-CCPA devices. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the handling of update packages provided to update.cgi. The issue results from the lack of proper verification of a cryptographic signature. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-24355.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2025-2764?

It affects 1 product.


Products: Carlinkit Autokit.

## How do I fix CVE-2025-2764?

No fix has been published for CVE-2025-2764 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-2764 being exploited?

There is no known exploitation of CVE-2025-2764 in the wild and no public exploit code.

## Other vulnerabilities in CarlinKit CPC200-CCPA

- [CVE-2025-2762](https://insights.sbomify.com/CVE-2025-2762/): CarlinKit CPC200-CCPA Missing Root of Trust Local Privilege Escalation Vulnerability (high 7.8)
- [CVE-2025-2765](https://insights.sbomify.com/CVE-2025-2765/): CarlinKit CPC200-CCPA Wireless Hotspot Hard-Coded Credentials Authentication Bypass Vulnerability (high 7.6)
- [CVE-2025-2763](https://insights.sbomify.com/CVE-2025-2763/): CarlinKit CPC200-CCPA Improper Verification of Cryptographic Signature Code Execution Vulnerability (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-2764 and fix it if it is affected.

What it is: CVE-2025-2764 is a high-severity vulnerability in CarlinKit CPC200-CCPA, published on 23 Apr 2025. 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-2025-2764 in the wild and no public exploit code.

Affected product: CarlinKit CPC200-CCPA. 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-2025-2764/ (Markdown: https://insights.sbomify.com/CVE-2025-2764/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-2764
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-2764
- OSV: https://osv.dev/vulnerability/CVE-2025-2764

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-2764/
Summaries are generated and may contain mistakes; the official description above is the record.