Which versions of N300rh Firmware are affected by CVE-2025-4851?

Organizations using A vulnerability classified as critical should be aware of moderate risk from CVE-2025-4851, a injection vulnerability rated CVSS 5.3.

How to fix or mitigate CVE-2025-4851?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

N300rh Firmware CVE-2025-4851

Q: What is the CVSS score of CVE-2025-4851?

CVE-2025-4851 has a CVSS 4.0 base score of 5.3 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 2.4%.

MEDIUM

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2025-05-18 cna@vuldb.com

Command Injection N300rh Firmware TOTOLINK

5.3

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:42 vuln.today

CVE Published

May 18, 2025 - 04:15 nvd

MEDIUM 5.3

DescriptionCVE.org

A vulnerability classified as critical was found in TOTOLINK N300RH 6.1c.1390_B20191101. This vulnerability affects the function setUploadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

A vulnerability classified as critical was found in TOTOLINK N300RH 6.1c.1390_B20191101. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-74. A vulnerability classified as critical was found in TOTOLINK N300RH 6.1c.1390_B20191101. This vulnerability affects the function setUploadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Affected products include: Totolink N300Rh Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.