# CVE-2018-17564: Missing authorization in n/a

> Attackers can delete configuration parameters and gain admin access to Grandstream GXP16xx VoIP phones via malformed input to the delete_CA endpoint.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Apr 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-4xmw-cxj4-7pmf

## What is CVE-2018-17564?

CVE-2018-17564 is a critical missing authorization vulnerability in n/a, published on 1 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Malformed Input String to /cgi-bin/delete_CA on Grandstream GXP16xx VoIP 1.0.4.128 phones allows attackers to delete configuration parameters and gain admin access to the device.

## Which versions are affected by CVE-2018-17564?

It affects 6 products.


Products: Grandstream Gxp1610 Firmware, Grandstream Gxp1615 Firmware, Grandstream Gxp1620 Firmware, Grandstream Gxp1625 Firmware, Grandstream Gxp1628 Firmware, Grandstream Gxp1630 Firmware.

## How do I fix CVE-2018-17564?

No fix has been published for CVE-2018-17564 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17564 being exploited?

There is no known exploitation of CVE-2018-17564 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-17565](https://insights.sbomify.com/CVE-2018-17565/): Command injection in n/a (critical 9.8)
- [CVE-2026-2329](https://insights.sbomify.com/CVE-2026-2329/): Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow (critical 9.3)
- [CVE-2020-5738](https://insights.sbomify.com/CVE-2020-5738/): Command injection in Grandstream GXP1600 Series (high 8.8)
- [CVE-2020-5739](https://insights.sbomify.com/CVE-2020-5739/): Command injection in Grandstream GXP1600 Series (high 8.8)
- [CVE-2018-17563](https://insights.sbomify.com/CVE-2018-17563/): Information disclosure in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17564 and fix it if it is affected.

What it is: CVE-2018-17564 is a critical missing authorization vulnerability in n/a, published on 1 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-17564 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-2018-17564/ (Markdown: https://insights.sbomify.com/CVE-2018-17564/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17564
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17564
- OSV: https://osv.dev/vulnerability/CVE-2018-17564

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-17564/
Summaries are generated and may contain mistakes; the official description above is the record.