IM
IronMonkey Threat Research

CVE-2026-26158 HIGH

Published: 2026-02-11 | Last Modified: 2026-06-02 | Status: Deferred

Description

A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.

Additional Descriptions (1)

Se encontró una falla en BusyBox. Esta vulnerabilidad permite a un atacante modificar archivos fuera del directorio de extracción previsto al crear un archivo tar malicioso que contiene entradas de hardlink o symlink no validadas. Si el archivo tar se extrae con privilegios elevados, esta falla puede conducir a una escalada de privilegios, permitiendo a un atacante obtener acceso no autorizado a archivos críticos del sistema.

CVSS Metrics

Base Score: 7.0 (HIGH)

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack VectorLOCAL
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionREQUIRED
ScopeUNCHANGED
Confidentiality ImpactHIGH
Integrity ImpactHIGH
Availability ImpactHIGH

Source: [email protected]

Type: Secondary

Exploitability Score: 1.0

Impact Score: 5.9

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-73
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