CVE-2020-9276

Name: CVE-2020-9276
Creator: NVD / NIST
Published: 2020-04-20T23:15:12.643+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.60%

Last modified Jun 17, 2026

CVE-2020-9276 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. The function do_cgi(), which processes cgi requests supplied to the device's web servers, is vulnerable to a remotely exploitable stack-based buffer overflow. EPSS estimates a 2.60% chance of exploitation in the next 30 days.

Description

An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. The function do_cgi(), which processes cgi requests supplied to the device's web servers, is vulnerable to a remotely exploitable stack-based buffer overflow. Unauthenticated exploitation is possible by combining this vulnerability with CVE-2020-9277.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.60%

83.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Dlink	Dsl-2640b Firmware	eu_4.01b

References

https://raelize.com/advisories/CVE-2020-9276_D-Link-DSL-2640B_do_cgi-buffer-overflow_v1.0.txtThird Party Advisory
https://raelize.com/posts/d-link-dsl-2640b-security-advisories/Exploit, Third Party Advisory
https://www.dlink.com/en/security-bulletinVendor Advisory
https://raelize.com/advisories/CVE-2020-9276_D-Link-DSL-2640B_do_cgi-buffer-overflow_v1.0.txtThird Party Advisory
https://raelize.com/posts/d-link-dsl-2640b-security-advisories/Exploit, Third Party Advisory
https://www.dlink.com/en/security-bulletinVendor Advisory

Timeline

Published: Apr 20, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9276?

How severe is CVE-2020-9276?

CVE-2020-9276 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.60% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9276?

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-2020-9276?

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

Scan your code now

Source: NVD / NIST