# CVE-2017-8686: Memory corruption in n/a

> An attacker can execute arbitrary code or cause denial of service on Windows Server DHCP failover servers via a memory corruption vulnerability.

- **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:** 13 Sep 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-27h2-vr79-q7cq

## What is CVE-2017-8686?

CVE-2017-8686 is a critical memory corruption vulnerability in Microsoft Windows Server 2012, published on 13 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Windows Server DHCP service in Windows Server 2012 Gold and R2, and Windows Server 2016 allows an attacker to either run arbitrary code on the DHCP failover server or cause the DHCP service to become nonresponsive, due to a memory corruption vulnerability in the Windows Server DHCP service, aka "Windows DHCP Server Remote Code Execution Vulnerability".

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2017-8686?

It affects 2 products.


Products: Microsoft Windows Server 2012, Microsoft Windows Server 2016.

## How do I fix CVE-2017-8686?

No fix has been published for CVE-2017-8686 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-8686 being exploited?

There is no known exploitation of CVE-2017-8686 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows Server 2012

- [CVE-2025-59287](https://insights.sbomify.com/CVE-2025-59287/): Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2026-69595](https://insights.sbomify.com/CVE-2026-69595/): Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2026-78445](https://insights.sbomify.com/CVE-2026-78445/): Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2026-41089](https://insights.sbomify.com/CVE-2026-41089/): Windows Netlogon Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2024-43639](https://insights.sbomify.com/CVE-2024-43639/): Windows KDC Proxy Remote Code Execution Vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-8686 and fix it if it is affected.

What it is: CVE-2017-8686 is a critical memory corruption vulnerability in Microsoft Windows Server 2012, published on 13 Sep 2017. 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-2017-8686 in the wild and no public exploit code.

Affected product: Microsoft Windows Server 2012. 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-2017-8686/ (Markdown: https://insights.sbomify.com/CVE-2017-8686/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-8686
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-8686
- OSV: https://osv.dev/vulnerability/CVE-2017-8686

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-8686/
Summaries are generated and may contain mistakes; the official description above is the record.