CVE-2020-36997
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductBacklinkSpeed
PublishedJan 29, 2026
First seenJan 29, 2026
Weakness typeCWE-121CWE-121
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Dummysoftware BacklinkSpeed | 2.4 | — |
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