CVE-2025-4978
Published: 20 May 2025
Summary
CVE-2025-4978 is a critical-severity Improper Authentication (CWE-287) vulnerability in Netgear Dgnd3700 Firmware. Its CVSS base score is 9.3 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 18.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability classified as very critical affects the Netgear DGND3700 router running firmware version 1.1.00.15_1.00.15NA. It resides in an unspecified portion of the /BRS_top.html file within the Basic Authentication component and stems from improper authentication handling (CWE-287). The issue permits remote attackers to interact with the endpoint without valid credentials.
An unauthenticated remote attacker can exploit the flaw to bypass authentication controls entirely. Successful exploitation grants full control over the affected device, resulting in high impact to confidentiality, integrity, and availability. The vulnerability has been publicly disclosed with an accompanying proof-of-concept, and the vendor was notified prior to publication.
The associated EPSS score remains low and unchanged at 0.0146 with no material increase since disclosure. Reference materials point to a detailed technical write-up on GitHub and entries in Vuldb, while the vendor site offers no additional mitigation guidance in the supplied references.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-15826
Vulnerability details
A vulnerability, which was classified as very critical, was found in Netgear DGND3700 1.1.00.15_1.00.15NA. This affects an unknown part of the file /BRS_top.html of the component Basic Authentication. The manipulation leads to improper authentication. It is possible to initiate the…
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attack remotely. The exploit has been disclosed to the public and may be used. Other products might be affected as well. The vendor was contacted early about this disclosure.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The backdoor authentication bypass in the Netgear DGND3700 router's web interface (/BRS_top.html) enables remote exploitation without credentials to gain full management access, facilitating T1190: Exploit Public-Facing Application.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Detects unauthorized successful logons resulting from improper authentication implementations.
Documented procedures ensure personnel are trained on authentication mechanisms, tangibly lowering the risk of improper authentication being exploited.
Security awareness training instructs users on secure authentication practices and avoiding credential compromise.
Training on authentication mechanisms and best practices decreases the occurrence of improper authentication.
Non-repudiation requires strong authentication mechanisms to irrefutably attribute performed actions to specific individuals or processes.
Session content review can reveal authentication bypasses or failures in session establishment.
Review of authentication-related audit records can detect improper authentication mechanisms or bypasses.
Assessments check authentication mechanisms for correct implementation and effectiveness, reducing successful authentication bypass attempts.