Threats / LG / CVE-2018-14839
CVE-2018-14839
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
LG N1A1 NAS vulnerability
LG N1A1 NAS devices are vulnerable to remote code execution via OS command injection, allowing unauthenticated attackers to execute arbitrary commands with system privileges.
Verdict
Today item — known-exploited.
An OS command injection flaw in LG N1A1 NAS enables remote code execution without authentication. The vulnerability has been actively exploited in the wild and carries high exploitation likelihood.
CISA KEV Yes · 2022-03-254EPSS 0.89354 (verify live)5CVSS 9.8 (CISA)3CISA SSVC Exploitation: active · Automatable: yes · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
679 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25).
Probability (EPSS)
EPSS 0.89354 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) · Affected: LG, N1A1 NAS. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-78 OS Command Injection — weakness family: Injection.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 1046 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify the NAS device on the network and probe for exposed management interfaces or API endpoints.
Business
Unpatched NAS devices remain discoverable and accessible to threat actors scanning for vulnerable appliances.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I craft a malicious request containing shell metacharacters to inject OS commands through an input parameter.
Business
Lack of input validation allows attackers to bypass application logic and execute system-level operations.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute commands with the privileges of the NAS service process to establish persistence or exfiltrate stored data.
Business
Compromised NAS devices become pivot points for lateral movement and repositories of sensitive organizational files are exposed.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05