Remote Denial-of-Service on CycloneTCP : CVE-2021-26788

CVE

CVE-2021-26788

Published

2021-04-12 22:00

Collected

2026-07-08 12:26

---
id: 4440
title: "Remote Denial-of-Service on CycloneTCP : CVE-2021-26788"
cve: CVE-2021-26788
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/remote-denial-of-service-on-cyclonetcp-cve-2021-26788.html"
published_at: "2021-04-12T22:00:00Z"
tags: ["denial-of-service", "fuzzing", "embedded", "cve-2021-26788", "cyclonetcp", "tcp-ip"]
phying_url: "https://phying.com/item/4440"
lang: en
---

# Remote Denial-of-Service on CycloneTCP : CVE-2021-26788

## Summary

A vulnerability report on CVE-2021-26788, a remotely triggerable denial-of-service in the CycloneTCP embedded TCP/IP stack caused by zero-length TCP options causing an infinite loop; fixed in 2.0.2.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **CVE:** CVE-2021-26788
- **Published:** 2021-04-12T22:00:00Z
- **Original:** https://blog.quarkslab.com/remote-denial-of-service-on-cyclonetcp-cve-2021-26788.html
- **Phying News:** https://phying.com/item/4440