CVE-2026-76940Network attack vector

Account access via unrestricted password guessing

Published Aug 27, 2026 · Updated Aug 27, 2026

Improper authentication throttling in Ebyte NE2-D11 Firmware FW-9167-0-11 allows remote attackers to automate password guessing. The device's password-authentication path accepts repeated attempts without rate limiting or account lockout. Network access to a deployment using password-based authentication is sufficient, and a guessed password grants the corresponding account access.

CVSS severity8.7
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication throttling in Ebyte NE2-D11 Firmware FW-9167-0-11 allows remote attackers to automate password guessing. The device's password-authentication path accepts repeated attempts without rate limiting or account lockout. Network access to a deployment using password-based authentication is sufficient, and a guessed password grants the corresponding account access.

The record

CVE
CVE-2026-76940
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Chengdu Ebyte Electronic Technology Co., Ltd.
Product
Ebyte NE2-D11 Firmware
Classifications
CWE-307, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record 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=FW-9167-0-11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Chengdu Ebyte Electronic Technology Co., Ltd. · Ebyte NE2-D11 Firmwareversion=FW-9167-0-11

Published CVSS scores

8.7CISA ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5CISA ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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