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Case File

CVE-2021-26843

HIGH · CVSS 7.5 EPSS 1.44% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-07 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. Public exploit code or proof-of-concept references have been detected in its references. It may lead to a denial-of-service condition.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-26843
Severity
HIGH
CVSS
7.5
EPSS
1.44%

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)