CVE-2021-40284

Name: CVE-2021-40284
Creator: NVD / NIST
Published: 2021-09-09T17:15:07.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.55%

Last modified Jun 17, 2026

CVE-2021-40284 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. D-Link DSL-3782 EU v1.01:EU v1.03 is affected by a buffer overflow which can cause a denial of service. This vulnerability exists in the web interface "/cgi-bin/New_GUI/Igmp.asp". EPSS estimates a 2.55% chance of exploitation in the next 30 days.

Description

D-Link DSL-3782 EU v1.01:EU v1.03 is affected by a buffer overflow which can cause a denial of service. This vulnerability exists in the web interface "/cgi-bin/New_GUI/Igmp.asp". Authenticated remote attackers can trigger this vulnerability by sending a long string in parameter 'igmpsnoopEnable' via an HTTP request.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.55%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Dlink	Dsl-3782 Firmware	eu_1.01
Dlink	Dsl-3782 Firmware	eu_1.03

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10245Patch, Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10245Patch, Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory

Timeline

Published: Sep 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40284?

How severe is CVE-2021-40284?

CVE-2021-40284 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40284?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40284?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST