What is the CVSS score of CVE-2026-26157?

CVE-2026-26157 has a contested CVSS base score of 7.0 from a third party (e.g. CISA-ADP), while the vendor rates it High. vuln.today uses the vendor rating as authoritative.

Is there a public PoC exploit available for CVE-2026-26157?

Yes, a public proof-of-concept exploit is available for CVE-2026-26157. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-26157?

Within 24 hours: Inventory all systems running BusyBox and identify those performing archive extraction operations, particularly from untrusted sources. Within 7 days: Implement input validation to reject archives from untrusted sources and restrict BusyBox usage to trusted archives only; document all affected systems. Within 30 days: Monitor vendor advisories for patch availability; evaluate alternative archive utilities with better security track records or prepare for emergency patching upon release.

BusyBox. Incomplete CVE-2026-26157

HIGH

External Control of File Name or Path (CWE-73)

2026-02-11 secalert@redhat.com

RCE

High

Disputed · 7.0 Vendor: redhat

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Create malicious archive with path traversal sequences
Delivery

User extracts archive via BusyBox utility
Exploit

Incomplete sanitization allows directory traversal
Execution

Files written outside extraction directory
Persist

Overwrite sensitive system files
Impact

Execute arbitrary code

Vulnerability Assessment

Weakness	CWE CWE-73 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V5 - File Handling File name/path control
Exploitation Conditions	BusyBox archive extraction utilities (tar, unzip, or cpio) processing untrusted archives; user interaction required to extract malicious archive; specific directory structure conditions enabling traversal bypass in path sanitization logic.
Impact	CVSS 7.0 (HIGH). Attack vector: Local. Complexity: High. Privileges required: None. User interaction: Required.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to craft malicious archives that when extracted, and under specific conditions, may.

Act Now Prioritize within 24-48h. Why: Active threat signals + CRITICAL/HIGH severity.

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

BusyBox archive extraction utilities contain insufficient path validation that enables attackers to write files outside intended directories through specially crafted archives, potentially leading to arbitrary file overwrite and code execution on affected systems. Local attackers with user interaction can exploit this vulnerability to modify sensitive system files and gain elevated privileges. No patch is currently available for this vulnerability.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:02 CVSS 7.0

RemediationAI

Monitor vendor advisories for a patch.

Affected ProductsAI

A flaw was found in BusyBox. Incomplete path sanitization in its archive extraction utilities

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

was found in BusyBox. Incomplete path sanitization in its archive extraction utilities allows an attacker to craft malicious archives that when extracted, and under specific conditions, may write to files outside the intended directory. This can lead to arbitrary file overwrite, potentially enabling code execution through the modification of sensitive system files.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Sources disagree (Low–High)

Vendor (redhat) PRIMARY 7.0 HIGH

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

SUSE 3.1 LOW

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

Red Hat 7.0 HIGH

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: redhat

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Apr 10, 2026 - 08:30 nvd

Patch available

CVE Published

Feb 11, 2026 - 21:16 nvd

HIGH 7.0

DescriptionCVE.org

A flaw was found in BusyBox. Incomplete path sanitization in its archive extraction utilities allows an attacker to craft malicious archives that when extracted, and under specific conditions, may write to files outside the intended directory. This can lead to arbitrary file overwrite, potentially enabling code execution through the modification of sensitive system files.

Executive ViewAI

Why It Matters

BusyBox archive extraction contains a path traversal vulnerability that could allow attackers to write files outside intended directories when processing malicious archives. Organizations using BusyBox for archive operations face potential data corruption, system compromise, or unauthorized file placement if untrusted archives are processed.

Business Impact: High

Compensating Controls

Disable BusyBox archive extraction utilities if not critical to operations; restrict archive processing to trusted, pre-validated sources only; implement file system monitoring to detect unauthorized writes outside intended directories; run BusyBox processes in containerized environments with strict volume mounts to limit filesystem access; apply strict input validation on archive sources; network-segment systems performing archive extraction.

Threat Intelligence Overview

Threat Score

4.9/10

Composite threat intelligence

EPSS Score

0.0%

Top 100% exploitable

Threat Intel

1 source

Exploit

POC

Public exploit code exists

Data Quality

7 sources

Confidence: High

NVD

CVE.org

EPSS CISA Vendor

Exploit-DB

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available Yes

Active threat Yes

Deciding rule

Active threat signals + CRITICAL/HIGH severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +35

PoC: +20

Weaponized: 0

Threat intel: +10

Gov advisory: 0

Attack Technique

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Same weakness CWE-73 – External Control of File Name or Path

View all

CVE-2024-8517 CRITICAL POC

9.8

CVE-2025-33053 HIGH POC

8.8

CVE-2023-4634 CRITICAL POC

9.8

CVE-2025-24054 MEDIUM POC

6.5

CVE-2026-96656 HIGH POC

8.6

CVE-2021-21343 HIGH POC

7.5

CVE-2025-0111 HIGH

7.1

CVE-2024-55372 CRITICAL POC

9.8

Same technique RCE

View all

CVE-2021-44228 CRITICAL POC

10.0

CVE-2017-7269 CRITICAL POC

9.8

CVE-2022-47966 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2023-3519 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2016-4117 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

Vendor StatusVendor

SUSE

Severity: Low

Product	Status
Container suse/sl-micro/6.0/baremetal-iso-image:2.1.4-6.135 Container suse/sl-micro/6.0/base-iso-image:2.1.4-5.135 Container suse/sl-micro/6.0/kvm-iso-image:2.1.4-6.142 Container suse/sl-micro/6.0/rt-iso-image:2.1.4-6.135	Affected
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.65 Container suse/sl-micro/6.0/base-os-container:2.1.3-7.34 Container suse/sl-micro/6.0/kvm-os-container:2.1.3-6.58 Container suse/sl-micro/6.0/rt-os-container:2.1.3-7.67 Container suse/sl-micro/6.0/toolbox:13.2-9.19 Image SL-Micro Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE	Affected
Container suse/sl-micro/6.1/baremetal-os-container:2.2.1-7.57 Container suse/sl-micro/6.1/base-os-container:2.2.1-5.78 Container suse/sl-micro/6.1/kvm-os-container:2.2.1-5.80 Container suse/sl-micro/6.1/rt-os-container:2.2.1-5.71 Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-BYOS-GCE Image SL-Micro-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd	Affected
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS	Fixed

Threat IntelligenceMISP

CISA Advisories

ICSA-26-188-05

Sources: CISA (public domain)

References

Advisories & patches

ADVISORY https://vuldb.com/vuln/345592 ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0758/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0759/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0872/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0892/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20726/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20905/ REF https://access.redhat.com/errata/RHSA-2026:13831 REF https://access.redhat.com/security/cve/CVE-2026-26157 REF https://bugzilla.redhat.com/show_bug.cgi?id=2439039 REF https://cert-portal.siemens.com/productcert/html/ssa-253495.html REF https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb REF https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26157.json

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