CVE-2025-28028

HIGH
2025-04-23 [email protected]
7.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 18:38 vuln.today
PoC Detected
May 06, 2025 - 20:08 vuln.today
Public exploit code
CVE Published
Apr 23, 2025 - 17:16 nvd
HIGH 7.3

Tags

Buffer Overflow A830R Firmware A950rg Firmware A3000Ru Firmware A3100R Firmware TOTOLINK

Description

TOTOLINK 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 buffer overflow vulnerability in downloadFile.cgi through the v5 parameter.

Analysis

TOTOLINK 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 buffer overflow vulnerability in. Rated high severity (CVSS 7.3), 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 Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. TOTOLINK 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 buffer overflow vulnerability in downloadFile.cgi through the v5 parameter. Affected products include: Totolink A830R Firmware, Totolink A950Rg Firmware, Totolink A3000Ru Firmware, Totolink A3100R Firmware.

Affected Products

Totolink A830R Firmware, Totolink A950Rg Firmware, Totolink A3000Ru Firmware, Totolink A3100R Firmware.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.

Priority Score

57
Low Medium High Critical
KEV: 0
EPSS: +0.3
CVSS: +36
POC: +20

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CVE-2025-28028 vulnerability details – vuln.today
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