---
cve: "CVE-2021-26843"
severity: "LOW"
cvss: 3.1
epss: "1.4%"
vendor: "n/a"
kev: false
exploited: false
published: "2021-02-07 21:15:11"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T15:24:14+02:00"
---

# CVE-2021-26843

> 3.1 LOW · 🧪 PoC

## Beschreibung

An issue was discovered in sthttpd through 2.27.1. On systems where the strcpy function is implemented with memcpy, the de_dotdot function may cause a Denial-of-Service (daemon crash) due to overlapping memory ranges being passed to memcpy. This can triggered with an HTTP GET request for a crafted filename. NOTE: this is similar to CVE-2017-10671, but occurs in a different part of the de_dotdot function.

## Referenzen

- <https://github.com/blueness/sthttpd/issues/14>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-26843) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_