# CVE-2019-25551: Sandboxie 5.30 Denial of Service via Program Alerts Buffer Overflow

> Local attackers can crash Sandboxie by pasting an excessively long string into the Program Alerts configuration field, causing a denial of service.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 21 Mar 2026
- **Updated:** 23 Mar 2026
- **Also known as:** GHSA-2fhg-mfw9-px88

## What is CVE-2019-25551?

CVE-2019-25551 is a medium-severity denial of service vulnerability in Sandboxie, published on 21 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Sandboxie 5.30 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Program Alerts configuration field. Attackers can paste a buffer of 5000 characters into the 'Select or enter a program' field during program alert configuration to trigger an application crash.

Weakness: CWE-1284 (Improper Validation of Specified Quantity in Input), CWE-1282 (Assumed-Immutable Data is Stored in Writable Memory)

## Which versions are affected by CVE-2019-25551?

It affects 1 product.


Products: Sandboxie-Plus Sandboxie.

## How do I fix CVE-2019-25551?

No fix has been published for CVE-2019-25551 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-25551 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25551 exists.

## Other vulnerabilities in Sandboxie

- [CVE-2018-18748](https://insights.sbomify.com/CVE-2018-18748/): Security feature bypass in n/a (critical 10.0)
- [CVE-2025-64721](https://insights.sbomify.com/CVE-2025-64721/): Sandboxie's Integer Overflow in SbieIniServer::RC4Crypt allows sandbox escape and SYSTEM compromise (critical 9.9)
- [CVE-2026-34458](https://insights.sbomify.com/CVE-2026-34458/): Sandboxie-Plus privilege escalation via INI CRLF injection bypassing EditAdminOnly (critical 9.3)
- [CVE-2024-49360](https://insights.sbomify.com/CVE-2024-49360/): Path traversal in Sandboxie (critical 9.2)
- [CVE-2026-34459](https://insights.sbomify.com/CVE-2026-34459/): Sandboxie-Plus sandbox escape via uninitialized memory leak and stack overflow in GetRawInputDeviceInfoSlave (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25551 and fix it if it is affected.

What it is: CVE-2019-25551 is a medium-severity denial of service vulnerability in Sandboxie, published on 21 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25551 exists.

Affected product: Sandboxie. 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-2019-25551/ (Markdown: https://insights.sbomify.com/CVE-2019-25551/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25551
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25551
- OSV: https://osv.dev/vulnerability/CVE-2019-25551

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-25551/
Summaries are generated and may contain mistakes; the official description above is the record.