CVE-2026-4477Public exploit

Adjacent-network access via shared setup credentials

Published Mar 20, 2026 · Updated Mar 20, 2026

Hard-coded credentials in YI Technology YI Home Camera 2 2.1.1_20171024151200 allow attackers to join its setup-mode Wi-Fi. The wifi_setup.sh and hostap.sh scripts write the same literal 12345670 value as the WPS PIN, and hostap.sh also writes it as the WPA passphrase. Exposure occurs only during first-time setup or after a factory reset; an adjacent unauthenticated attacker can join the camera's setup network, while no broader device-control impact is documented.

CVSS severity3.1
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in YI Technology YI Home Camera 2 2.1.1_20171024151200 allow attackers to join its setup-mode Wi-Fi. The wifi_setup.sh and hostap.sh scripts write the same literal 12345670 value as the WPS PIN, and hostap.sh also writes it as the WPA passphrase. Exposure occurs only during first-time setup or after a factory reset; an adjacent unauthenticated attacker can join the camera's setup network, while no broader device-control impact is documented.

The record

CVE
CVE-2026-4477
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
YI Technology
Product
YI Home Camera
Classifications
CWE-321, CWE-320, T1078
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 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=2 2.1.1_20171024151200

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

YI Technology · YI Home Cameraversion=2 2.1.1_20171024151200

Published CVSS scores

1.3VulDBCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
1.8VulDBAV:A/AC:H/Au:N/C:P/I:N/A:N
3.1VulDBCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
CWE-320Key Management Errors
T1078Valid Accounts

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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