CVE-2025-29521

MEDIUM

Published Aug 25, 2025 Modified Sep 2, 2025 CWE-1392

Description

Insecure default credentials for the Adminsitrator account of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to escalate privileges via a bruteforce attack.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-1392 CWE-1392

Affected Products

Vendor	Product	Versions
dlink	dsl-7740c_firmware	All
dlink	dsl-7740c	All

References

Advisories & Patches

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

Exploits

https://gist.github.com/stevenyu113228/73f06459df5ac3257ff451e382497832

Frequently Asked Questions

What is CVE-2025-29521? +

Insecure default credentials for the Adminsitrator account of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to escalate privileges via a bruteforce attack. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-29521? +

CVE-2025-29521 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-29521? +

CVE-2025-29521 affects products from dlink, specifically: dsl-7740c, dsl-7740c_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-29521? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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