CVE-2019-3997Public exploit

Alarm disarming via unauthenticated rogue keypad pairing

Published Jan 16, 2020 · Updated Aug 4, 2024

Authentication bypass in SimpliSafe SS3 firmware 1.0 through 1.3 allows physically proximate attackers to pair a rogue keypad. Pressing the Base Station's bottom pairing button causes it to accept a keypad already paired to another Base Station, and the dual-paired keypad can use the other system's PIN to disarm both systems. Physical access to the Base Station, a second Base Station, and its paired keypad are required; the attack disables the victim's armed alarm without its PIN.

CVSS severity1.9
Low
EPSS probability0.39%
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 SimpliSafe SS3 firmware 1.0 through 1.3 allows physically proximate attackers to pair a rogue keypad. Pressing the Base Station's bottom pairing button causes it to accept a keypad already paired to another Base Station, and the dual-paired keypad can use the other system's PIN to disarm both systems. Physical access to the Base Station, a second Base Station, and its paired keypad are required; the attack disables the victim's armed alarm without its PIN.

The record

CVE
CVE-2019-3997
Published
Jan 16, 2020
Updated
Aug 4, 2024
Vendor
SimpliSafe
Product
SimpliSafe Base Station (Gen 3)
Classifications
CWE-287, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

  1. Affected versionversion=1.0-1.3

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

SimpliSafe · SimpliSafe Base Station (Gen 3)version=1.0-1.3

Published CVSS scores

1.9TenableAV:L/AC:M/Au:N/C:N/I:P/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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1200Hardware Additions

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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