# CVE-2019-25564: PCHelpWareV2 1.0.0.5 Denial of Service via Group Field

> Local attackers can crash PCHelpWareV2 by inputting an excessively long string into the Group field, causing a buffer overflow.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Mar 2026
- **Updated:** 24 Mar 2026
- **Also known as:** GHSA-3v7v-cgjc-xh4g

## What is CVE-2019-25564?

CVE-2019-25564 is a medium-severity memory corruption vulnerability in Uvnc PCHelpWareV2, published on 21 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

PCHelpWareV2 1.0.0.5 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Group field. Attackers can paste a buffer overflow payload into the Group property field and click Ok to trigger an application crash.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2019-25564?

It affects 1 product.


Products: Uvnc Pchelpwarev2.

## How do I fix CVE-2019-25564?

No fix has been published for CVE-2019-25564 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-25564 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25564 exists.

## Other vulnerabilities in Uvnc PCHelpWareV2

- [CVE-2019-25563](https://insights.sbomify.com/CVE-2019-25563/): PCHelpWareV2 1.0.0.5 Denial of Service via SC Creation (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25564 and fix it if it is affected.

What it is: CVE-2019-25564 is a medium-severity memory corruption vulnerability in Uvnc PCHelpWareV2, published on 21 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25564 exists.

Affected product: Uvnc PCHelpWareV2. 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-2019-25564/ (Markdown: https://insights.sbomify.com/CVE-2019-25564/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25564
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25564
- OSV: https://osv.dev/vulnerability/CVE-2019-25564

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-25564/
Summaries are generated and may contain mistakes; the official description above is the record.