What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-29 · updated 2026-06-17
• Weakness: CWE-121

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.

Affected products

• Dummysoftware BacklinkSpeed: 2.4

References

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

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