What is the CVSS score of CVE-2025-28256?

CVE-2025-28256 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 4.2%.

Which versions of A3100R Firmware are affected by CVE-2025-28256?

Organizations using TOTOLINK A3100R face critical risk from CVE-2025-28256, a OS command injection vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-28256?

Yes, a public proof-of-concept exploit is available for CVE-2025-28256. Prioritise patching immediately. EPSS: 4.2%.

How to fix or mitigate CVE-2025-28256?

Within 24 hours: Identify all affected systems running TOTOLINK A3100R and apply vendor patches immediately. Validate that input sanitization is in place for all user-controlled parameters.

A3100R Firmware CVE-2025-28256

CRITICAL

OS Command Injection (CWE-78)

2025-03-28 cve@mitre.org

Command Injection RCE A3100R Firmware TOTOLINK

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:33 vuln.today

PoC Detected

Apr 14, 2025 - 17:06 vuln.today

Public exploit code

CVE Published

Mar 28, 2025 - 21:15 nvd

CRITICAL 9.8

DescriptionCVE.org

An issue in TOTOLINK A3100R V4.1.2cu.5247_B20211129 allows a remote attacker to execute arbitrary code via the setWebWlanIdx of the file /lib/cste_modules/wireless.so.

AnalysisAI

An issue in TOTOLINK A3100R V4.1.2cu.5247_B20211129 allows a remote attacker to execute arbitrary code via the setWebWlanIdx of the file /lib/cste_modules/wireless.so. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. An issue in TOTOLINK A3100R V4.1.2cu.5247_B20211129 allows a remote attacker to execute arbitrary code via the setWebWlanIdx of the file /lib/cste_modules/wireless.so. Affected products include: Totolink A3100R Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.

CVE-2025-28256 vulnerability details – vuln.today

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A3100R Firmware CVE-2025-28256

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code