VULNERABILITY INTELLIGENCE

CVE-2021-26843

CVSS score7.5 HIGH
EPSS probability1.44%
CISA KEVNot currently listed
Published2021-02-07
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-119

Primary references