CVE-2020-9277

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. Authentication can be bypassed when accessing cgi modules. This allows one to perform administrative tasks (e.g., modify the admin password) with no authentication.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://raelize.com/advisories/CVE-2020-9277_D-Link-DSL-2640B_CGI-Authentication-bypass_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-2020-9277_D-Link-DSL-2640B_CGI-Authentication-bypass_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
NVD status: Modified

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