What is the CVSS score of CVE-2025-28138?

CVE-2025-28138 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: 7.9%.

Which versions of A800R Firmware are affected by CVE-2025-28138?

Organizations using a pre-auth remote command execution vulnerability in the setNoticeCfg function face critical risk from CVE-2025-28138, a OS command injection vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-28138?

Yes, a public proof-of-concept exploit is available for CVE-2025-28138. Prioritise patching immediately. EPSS: 7.9%.

How to fix or mitigate CVE-2025-28138?

Within 24 hours: Identify all affected systems running a pre-auth remote command execution vulnerability in the set and apply vendor patches immediately. Validate that input sanitization is in place for all user-controlled parameters.

A800R Firmware CVE-2025-28138

CRITICAL

OS Command Injection (CWE-78)

2025-03-27 cve@mitre.org

Command Injection A800R 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 15, 2025 - 15:16 vuln.today

Public exploit code

CVE Published

Mar 27, 2025 - 16:15 nvd

CRITICAL 9.8

DescriptionCVE.org

The TOTOLINK A800R V4.1.2cu.5137_B20200730 were found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through the NoticeUrl parameter.

AnalysisAI

The TOTOLINK A800R V4.1.2cu.5137_B20200730 were found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through the NoticeUrl parameter. 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. The TOTOLINK A800R V4.1.2cu.5137_B20200730 were found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through the NoticeUrl parameter. Affected products include: Totolink A800R 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-2025-28138 vulnerability details – vuln.today

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A800R Firmware CVE-2025-28138

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code