QwikSec

Security Database

CVE

CWE

Training

CVE-2020-36997

Published: Jan 29, 2026

Modified: May 12, 2026

PUBLISHED

CVSS v3.1

9.8

CRITICAL

Description

BacklinkSpeed 2.4 contains a buffer overflow vulnerability that allows attackers to corrupt the Structured Exception Handler (SEH) chain through malicious file import. Attackers can craft a specially designed payload file to overwrite SEH addresses, potentially executing arbitrary code and gaining control of the application.

Vendor	Product	Versions
Dummysoftware	BacklinkSpeed	affected `2.4`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 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

References

ExploitDB-48726

exploit

Vendor Homepage

product

Software Download Page

product

VulnCheck Advisory: BacklinkSpeed 2.4 - Buffer Overflow PoC (SEH)

third-party-advisory

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.