What is the CVSS score of CVE-2026-25603?

CVE-2026-25603 has a CVSS 3.1 base score of 6.6 (Medium). CVSS vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Mr9600 Firmware are affected by CVE-2026-25603?

CVE-2026-25603 presents notable security risk, a path traversal vulnerability rated CVSS 6.6. This could allow unauthorized file access. Proof-of-concept code is publicly available.

Is there a public PoC exploit available for CVE-2026-25603?

Yes, a public proof-of-concept exploit is available for CVE-2026-25603. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-25603?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls.

Mr9600 Firmware CVE-2026-25603

MEDIUM

Path Traversal (CWE-22)

2026-02-24 a6d3dc9e-0591-4a13-bce7-0f5b31ff6158

Path Traversal Linksys Mr9600 Firmware Mx4200 Firmware

6.6

CVSS 3.1 · NVD

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

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

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. Affected versions include MR9600 1.0.4.205530 and MX4200 1.0.13.210200.

Technical ContextAI

Classified as CWE-22 (Path Traversal). Affects Mr9600 Firmware. 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.