CVE-2020-36997 HIGH

CVE-2020-36997: BacklinkSpeed 2.4 - Buffer Overflow PoC (SEH)

Vendor Dummysoftware
Product BacklinkSpeed
Weakness CWE-121
Published January 29, 2026
Last update May 12, 2026

CVSS base score

8.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 29, 2026 CVE published
May 12, 2026 Record updated