# CVE-2017-12711: Privilege escalation in Advantech WebAccess

> A built-in user account in Advantech WebAccess has excessive privileges, allowing attackers to elevate to administrative access.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/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:** 30 Aug 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-f93x-3rmr-5f55

## What is CVE-2017-12711?

CVE-2017-12711 is a high-severity vulnerability in Advantech Webaccess, published on 30 Aug 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An Incorrect Privilege Assignment issue was discovered in Advantech WebAccess versions prior to V8.2_20170817. A built-in user account has been granted a sensitive privilege that may allow a user to elevate to administrative privileges.

Weakness: CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2017-12711?

It affects 1 product.


Products: Advantech Webaccess.

## How do I fix CVE-2017-12711?

No fix has been published for CVE-2017-12711 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-12711 being exploited?

There is no known exploitation of CVE-2017-12711 in the wild and no public exploit code.

## Other vulnerabilities in Advantech Webaccess

- [CVE-2014-9208](https://insights.sbomify.com/CVE-2014-9208/): Multiple stack-based buffer overflows in unspecified DLL files in Advantech WebAccess before 8.0.1 allow remote attackers to execute arbitra (critical 10.0)
- [CVE-2021-33023](https://insights.sbomify.com/CVE-2021-33023/): Advantech WebAccess (critical 9.8)
- [CVE-2021-38389](https://insights.sbomify.com/CVE-2021-38389/): Advantech WebAccess (critical 9.8)
- [CVE-2021-38408](https://insights.sbomify.com/CVE-2021-38408/): Memory corruption in Advantech WebAccess (critical 9.8)
- [CVE-2020-12019](https://insights.sbomify.com/CVE-2020-12019/): Memory corruption in WebAccess Node (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-12711 and fix it if it is affected.

What it is: CVE-2017-12711 is a high-severity vulnerability in Advantech Webaccess, published on 30 Aug 2017. 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-2017-12711 in the wild and no public exploit code.

Affected product: Advantech Webaccess. 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-2017-12711/ (Markdown: https://insights.sbomify.com/CVE-2017-12711/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-12711
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-12711
- OSV: https://osv.dev/vulnerability/CVE-2017-12711

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-12711/
Summaries are generated and may contain mistakes; the official description above is the record.