CVE-2019-7256Known exploitationPublic exploitNetwork attack vector

Unauthenticated command execution via unchecked card-decoder parameters

Published Jul 2, 2019 · Updated Oct 21, 2025

OS command injection in Linear eMerge E3-Series 1.00-06 allows remote attackers to execute commands via crafted HTTP requests. The card_scan_decoder.php endpoint passes attacker-controlled door input into shell interpretation without neutralizing command substitution. Exploitation requires network access to the web interface but no login, executes initially as the web-server account, and reaches root when the default root password remains configured.

CVSS severity9.8
Critical
EPSS probability97.08%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Linear eMerge E3-Series 1.00-06 allows remote attackers to execute commands via crafted HTTP requests. The card_scan_decoder.php endpoint passes attacker-controlled door input into shell interpretation without neutralizing command substitution. Exploitation requires network access to the web interface but no login, executes initially as the web-server account, and reaches root when the default root password remains configured.

The record

CVE
CVE-2019-7256
Published
Jul 2, 2019
Updated
Oct 21, 2025
Vendor
Nortek Security & Control
Product
Linear eMerge Elite Firmware
Classifications
CWE-78, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 2, 2019CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record 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=1.00-06

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nortek Security & Control · Linear eMerge Elite Firmwareversion=1.00-06
Nortek Security & Control · Linear eMerge Essential Firmwareversion=1.00-06

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20269
Sep 23, 20262
Sep 24, 20269
Sep 25, 202614
Sep 26, 20265
Sep 27, 202616
Sep 28, 20269
Latest reporting daySep 28, 2026
Latest daily unique IPs9
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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