CVE-2018-14839Known exploitationPublic exploitNetwork attack vector

Unauthenticated root execution via unchecked POST parameters

Published May 14, 2019 · Updated Oct 21, 2025

Command injection in LG Electronics N1A1 NAS 3718.510 allows remote attackers to execute commands via HTTP POST parameters. The /system/sharedir.php and /en/php/usb_sync.php scripts concatenate uid and task_number, respectively, into shell commands without sanitization. Neither endpoint requires a valid session, and unrestricted passwordless sudo permits root execution when the web interface is reachable.

CVSS severity9.8
Critical
EPSS probability89.25%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in LG Electronics N1A1 NAS 3718.510 allows remote attackers to execute commands via HTTP POST parameters. The /system/sharedir.php and /en/php/usb_sync.php scripts concatenate uid and task_number, respectively, into shell commands without sanitization. Neither endpoint requires a valid session, and unrestricted passwordless sudo permits root execution when the web interface is reachable.

The record

CVE
CVE-2018-14839
Published
May 14, 2019
Updated
Oct 21, 2025
Vendor
LG Electronics
Product
N1A1 NAS
Classifications
CWE-78, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LG Electronics · N1A1 NASversion=n/a

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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, 20261
Sep 23, 2026Unavailable
Sep 24, 20263
Sep 25, 2026Unavailable
Sep 26, 2026Unavailable
Sep 27, 20261
Sep 28, 20261
Latest reporting daySep 28, 2026
Latest daily unique IPs1
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
T1059.004Unix Shell

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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