EUVD-2026-20809

| CVE-2026-5815 HIGH
2026-04-08 VulDB
7.4
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
PoC Detected
Apr 09, 2026 - 00:16 vuln.today
Public exploit code
Analysis Generated
Apr 08, 2026 - 23:31 vuln.today
EUVD ID Assigned
Apr 08, 2026 - 23:31 euvd
EUVD-2026-20809
CVE Published
Apr 08, 2026 - 23:15 nvd
HIGH 7.4

Tags

D-Link Buffer Overflow Stack Overflow Dir 645

Description

A vulnerability was detected in D-Link DIR-645 1.01/1.02/1.03. Impacted is the function hedwigcgi_main of the file /cgi-bin/hedwig.cgi. The manipulation results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Analysis

Stack-based buffer overflow in D-Link DIR-645 router (versions 1.01, 1.02, 1.03) via hedwigcgi_main function in /cgi-bin/hedwig.cgi allows authenticated remote attackers to achieve complete system compromise. Exploitation requires low-privilege credentials but no user interaction. …

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Remediation

Within 24 hours: Identify all D-Link DIR-645 devices on the network using inventory tools and determine business-critical vs. non-critical deployments. …

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Priority Score

57
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +37
POC: +20

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EUVD-2026-20809 vulnerability details – vuln.today
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