BusyBox Vulnerability in FEATURE_WGET_TIMEOUT Leading to Null Pointer Dereference
CVE-2026-76014

4.8MEDIUM

Key Information:

Vendor

BusyBox

Status
Busybox
Vendor
CVE Published:
19 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-76014?

A vulnerability exists in BusyBox affecting the FEATURE_WGET_TIMEOUT handler in networking/wget.c, specifically due to improper handling of the -T argument. This vulnerability can lead to a null pointer dereference, potentially allowing local users to exploit the issue. Due to the public disclosure of this exploit, it is crucial for users to apply the available patch (commit 83a40bf7a93c8ac093d33ab452222dd5b9eb57ff) to safeguard against this risk.

Affected Version(s)

BusyBox 1.30.0

BusyBox 1.30.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-76014 - Proof of Concept

References

https://vuldb.com/vuln/391923
vdb-entrytechnical-description
https://vuldb.com/vuln/391923/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-76014
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

yuxin_wang (VulDB User)
.