What is the CVSS score of CVE-2025-28019?

CVE-2025-28019 has a CVSS 3.1 base score of 7.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.3%.

Which versions of A800R Firmware are affected by CVE-2025-28019?

Organizations using TOTOLINK A800R V4.1.2cu.5137_B20200730 face moderate risk from CVE-2025-28019, a buffer overflow vulnerability rated CVSS 7.3.

Is there a public PoC exploit available for CVE-2025-28019?

Yes, a public proof-of-concept exploit is available for CVE-2025-28019. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-28019?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

A800R Firmware CVE-2025-28019

HIGH

Classic Buffer Overflow (CWE-120)

2025-04-23 cve@mitre.org

Buffer Overflow A800R Firmware TOTOLINK

7.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.3 HIGH

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

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: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

Analysis Generated

Mar 28, 2026 - 18:38 vuln.today

PoC Detected

May 06, 2025 - 20:35 vuln.today

Public exploit code

CVE Published

Apr 23, 2025 - 17:16 nvd

HIGH 7.3

DescriptionCVE.org

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in the downloadFile.cgi component

AnalysisAI

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in the downloadFile.cgi component. 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 ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in the downloadFile.cgi component Affected products include: Totolink A800R Firmware.

RemediationAI

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.

CVE-2025-28019 vulnerability details – vuln.today

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