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CVE-2026-26158

Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries

CVSS 7 HIGHEPSS 0.2%CWE-73
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7EPSS 0.2%KEV nãoPoC Nuclei Metasploit Patch referenciado
Lifecycle
11 Feb 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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