CVE-2025-4978Public exploitNetwork attack vector

Unauthenticated management access via blank-state flag

Published May 20, 2025 · Updated May 20, 2025

Authentication bypass in NETGEAR DGND3700v2 1.1.00.15_1.00.15NA allows remote attackers to access its management interface. Requesting /BRS_top.html sets start_in_blankstate to 1, causing mini_http's Basic Authentication routine to skip credential verification. No credentials or user interaction are required, and the bypass grants access to all management functions exposed by the router's web interface.

CVSS severity9.3
Critical
EPSS probability20.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in NETGEAR DGND3700v2 1.1.00.15_1.00.15NA allows remote attackers to access its management interface. Requesting /BRS_top.html sets start_in_blankstate to 1, causing mini_http's Basic Authentication routine to skip credential verification. No credentials or user interaction are required, and the bypass grants access to all management functions exposed by the router's web interface.

The record

CVE
CVE-2025-4978
Published
May 20, 2025
Updated
May 20, 2025
Vendor
NETGEAR
Product
DGND3700v1
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. May 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.1.00.15_1.00.15NA

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NETGEAR · DGND3700v1version=1.1.00.15_1.00.15NA

Published CVSS scores

10.0VulDBAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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