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Vulnerability record · CVE-2020-36997 · published 29 January 2026

CVE-2020-36997: Stack-based buffer overflow vulnerability

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.

8.4 CVSS 4.0 High EPSS 0.42% · top 66.8% CWE-121 · Stack-based buffer overflow Deferred
8.4CVSS 4.0 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2020-36997), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.