CVE-2025-28034

CRITICAL
2025-04-22 [email protected]
9.8
CVSS 3.1
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CVSS Vector

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

3
Analysis Generated
Mar 28, 2026 - 18:38 vuln.today
PoC Detected
Apr 29, 2025 - 16:18 vuln.today
Public exploit code
CVE Published
Apr 22, 2025 - 14:15 nvd
CRITICAL 9.8

Tags

Command Injection A800R Firmware A810R Firmware A830R Firmware A950rg Firmware A3000Ru Firmware A3100R Firmware TOTOLINK

Description

TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a pre-auth remote command execution vulnerability in the NTPSyncWithHost function through the hostTime parameter.

Analysis

TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129. 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 Context

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a pre-auth remote command execution vulnerability in the NTPSyncWithHost function through the hostTime parameter. Affected products include: Totolink A800R Firmware, Totolink A810R Firmware, Totolink A830R Firmware, Totolink A950Rg Firmware, Totolink A3000Ru Firmware.

Affected Products

Totolink A800R Firmware, Totolink A810R Firmware, Totolink A830R Firmware, Totolink A950Rg Firmware, Totolink A3000Ru Firmware.

Remediation

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.

Priority Score

75
Low Medium High Critical
KEV: 0
EPSS: +6.4
CVSS: +49
POC: +20

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CVE-2025-28034 vulnerability details – vuln.today
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