TI-2020-07632 Aliases CVE-2020-9544 GHSA-5qgx-q55q-4jm7

An issue was discovered on D-Link DSL-2640B E1 EU_1.01 devices.

LOW 36CWE-306Published 2020-03-05 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.

Summary

An issue was discovered on D-Link DSL-2640B E1 EU_1.01 devices. The administrative interface doesn't perform authentication checks for a firmware-update POST request. Any attacker that can access the administrative interface can install firmware of their choice.

Why it matters now

EPSS 0.01356 71st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:d-link:dsl-2640b_firmware:e1_eu_1.01:::::::*	e1_eu_1.01	Vulnerable	D-Link
cpe:2.3:h:d-link:dsl-2640b:-:::::::*	not specified by NVD	Running on	D-Link

cpe:2.3:o:d-link:dsl-2640b_firmware:e1_eu_1.01:*:*:*:*:*:*:* Versions e1_eu_1.01 Vulnerable ·D-Link
cpe:2.3:h:d-link:dsl-2640b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·D-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-9544
2026-10-03 Alias added: GHSA-5qgx-q55q-4jm7

References

Exploit 1

https://ktln2.org/2020/03/05/cve-2020-9544/

Advisory 1

https://www.dlink.com/en/security-bulletin

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences