CVE-2018-11402: SimpliSafe Original has Unencrypted Keypad Transmissions, which allows physically proximate attackers to disco

Routine

MEDIUM 6.6MITIGATE

CVE-2018-11402 is a medium-severity flaw (CVSS 6.6) affecting u9k-kp1000 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SimpliSafe Original has Unencrypted Keypad Transmissions, which allows physically proximate attackers to discover the PIN.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.6 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-319
Published	2018-05-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: simplisafe

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-05-24 05:29 UTCPublished CVE record published
2026-06-17 01:35 UTCUpdated Record last modified

simplisafe u9k-kp1000 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-11402?

u9k-kp1000 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-11402 being exploited?

CVE-2018-11402 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-11402 affect?

CVE-2018-11402 affects u9k-kp1000 firmware. Severity is medium (CVSS 6.6). SimpliSafe Original has Unencrypted Keypad Transmissions, which allows physically proximate attackers to discover the PIN.

How urgent is CVE-2018-11402?

Priority 26/100. No elevated risk signals yet.

References

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