CVE-2020-36997
CRITICAL
2026-01-29
[email protected]
9.8
CVSS 3.1
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CVSS Vector
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
Lifecycle Timeline
3
Analysis Generated
Mar 12, 2026 - 22:00 vuln.today
PoC Detected
Jan 29, 2026 - 16:31 vuln.today
Public exploit code
CVE Published
Jan 29, 2026 - 15:16 nvd
CRITICAL 9.8
Tags
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.
Analysis
Buffer overflow in BacklinkSpeed 2.4 allows code execution via SEH chain corruption through malicious input. PoC available.
Technical Context
CWE-121 stack overflow corrupting SEH chain.
Affected Products
['BacklinkSpeed 2.4']
Remediation
Update or discontinue use.
Priority Score
69
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +49
POC: +20
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External POC / Exploit Code
Leaving vuln.today
Destination URL
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