CVE-2020-36997

CRITICAL 9.8

BacklinkSpeed 2.4 - Buffer Overflow PoC (SEH)

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

13th

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.

CWE	CWE-121
Vendor	dummysoftware
Product	backlinkspeed
Published	Jan 29, 2026
Last Updated	May 12, 2026

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CVSS v3 Breakdown

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

Affected Versions

Dummysoftware / BacklinkSpeed

2.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/48726 dummysoftware.com: http://www.dummysoftware.com dummysoftware.com: http://www.dummysoftware.com/backlinkspeed.html vulncheck.com: https://www.vulncheck.com/advisories/backlinkspeed-buffer-overflow-poc-seh

Credits

Saeed reza Zamanian