CVE-2021-20107Public exploit

Information disclosure and water-control changes via unauthenticated BLE

Published Jun 30, 2021 · Updated Aug 3, 2024

Missing authentication in Sloan SmartFaucets and SOLIS Flushometers allows physically proximate attackers to read data and alter settings via BLE. The BLE GATT interface permits unauthenticated access to characteristics for device details, flow rate, sensor range, runtime, and water dispensing. Bluetooth proximity is required; writes can change water flow or sensor behavior, while reads expose device and maintenance information.

CVSS severity5.4
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Sloan SmartFaucets and SOLIS Flushometers allows physically proximate attackers to read data and alter settings via BLE. The BLE GATT interface permits unauthenticated access to characteristics for device details, flow rate, sensor range, runtime, and water dispensing. Bluetooth proximity is required; writes can change water flow or sensor behavior, while reads expose device and maintenance information.

The record

CVE
CVE-2021-20107
Published
Jun 30, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T0836
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NIST NVDAV:A/AC:L/Au:N/C:P/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
5.3TenableCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T0836Modify Parameter

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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