CVE-2020-36997

CRITICAL

BacklinkSpeed 2.4 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-36997. PoCs published by Saeed reza Zamanian.

AI-analyzed exploit summary This exploit demonstrates a buffer overflow vulnerability in BacklinkSpeed 2.4 by overwriting the SEH chain and EIP with controlled values. It generates a payload file that triggers the crash when imported into the application.

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.

Exploits (1)

exploitdb WORKING POC
by Saeed reza Zamanian · pythonlocalwindows
https://www.exploit-db.com/exploits/48726

This exploit demonstrates a buffer overflow vulnerability in BacklinkSpeed 2.4 by overwriting the SEH chain and EIP with controlled values. It generates a payload file that triggers the crash when imported into the application.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: BacklinkSpeed 2.4
No auth needed
Prerequisites: BacklinkSpeed 2.4 installed · Ability to import a malicious file into the application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/48726
Various Sources product
http://www.dummysoftware.com

Scores

CVSS v3 9.8
EPSS 0.0037
EPSS Percentile 28.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-121
Status published
Products (1)
Dummysoftware/BacklinkSpeed 2.4
Published Jan 29, 2026
Tracked Since Feb 18, 2026