# CVE-2018-25266: Angry IP Scanner 3.5.3 Denial of Service via Preferences Buffer Overflow

> Local attackers can crash Angry IP Scanner by pasting a large string into the preferences dialog, causing a buffer overflow.

- **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:** 22 Apr 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-348g-w65w-cxjq

## What is CVE-2018-25266?

CVE-2018-25266 is a medium-severity memory corruption vulnerability in Angryip Angry IP Scanner, published on 22 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Angry IP Scanner 3.5.3 contains a buffer overflow vulnerability in the preferences dialog that allows local attackers to crash the application by supplying an excessively large string. Attackers can generate a file containing a massive buffer of repeated characters and paste it into the unavailable value field in the display preferences to trigger a denial of service.

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

## Which versions are affected by CVE-2018-25266?

It affects 1 product.


Products: Angryip Angry Ip Scanner.

## How do I fix CVE-2018-25266?

No fix has been published for CVE-2018-25266 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25266 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25266 exists.

## Other vulnerabilities in Angryip Angry IP Scanner

- [CVE-2018-25262](https://insights.sbomify.com/CVE-2018-25262/): Angry IP Scanner for Linux 3.5.3 Denial of Service (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25266 and fix it if it is affected.

What it is: CVE-2018-25266 is a medium-severity memory corruption vulnerability in Angryip Angry IP Scanner, published on 22 Apr 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-2018-25266 exists.

Affected product: Angryip Angry IP Scanner. 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-2018-25266/ (Markdown: https://insights.sbomify.com/CVE-2018-25266/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25266
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25266
- OSV: https://osv.dev/vulnerability/CVE-2018-25266

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-25266/
Summaries are generated and may contain mistakes; the official description above is the record.