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Mx4200 Firmware CVE-2026-25603

MEDIUM
Path Traversal (CWE-22)
2026-02-24 a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
6.6
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.6 MEDIUM
AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 26, 2026 - 18:10 vuln.today
Public exploit code
CVE Published
Feb 24, 2026 - 18:29 nvd
MEDIUM 6.6

DescriptionCVE.org

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Linksys MR9600, Linksys MX4200 allows that contents of a USB drive partition can be mounted in an arbitrary location of the file system. This may result in the execution of shell scripts in the context of a root user.This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.

AnalysisAI

Path traversal in Linksys MR9600 and MX4200 firmware allows attackers with physical access to mount arbitrary USB drive partitions into the file system, potentially enabling root-level code execution. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Vulnerability AssessmentAI

Risk Assessment CVSS 6.6 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker could exploit this vulnerability to the execution of shell scripts in the context of a root user.
Remediation Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

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Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-25603 vulnerability details – vuln.today

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