Critical 9.8Published Jan 29, 2026

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

Updated under an hour ago (Oct 26, 2026, 9:10 AM ET)

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It affects Dummysoftware BacklinkSpeed. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Dummysoftware BacklinkSpeed

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Dummysoftware BacklinkSpeed dummysoftware:backlinkspeed (from the name)	2.4	CNA record

References

https://www.exploit-db.com/exploits/48726exploit
http://www.dummysoftware.comproduct
http://www.dummysoftware.com/backlinkspeed.htmlproduct
https://www.vulncheck.com/advisories/backlinkspeed-buffer-overflow-poc-sehthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.