CVE-2018-8834

Parsing malformed project files in Omron CX-One versions 4.42 and prior, including the following applications: CX-FLnet versions 1.00 and prior, CX-Protocol versions 1.992 and prior, CX-Programmer versions 9.65 and prior, CX-Server versions 5.0.22 and prior, Network Configurator versions 3.63 and prior, and Switch Box Utility versions 1.68 and prior, may cause a heap-based buffer overflow.

Published: 2018-04-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-8834 is rated Moderate Risk (40.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.11%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-8834

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.22% 0.11% -0.11%
2 2025-03-29 0.11% 0.22% +0.11%
3 2025-03-17 — 0.11% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-8834

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2018-8834

Affected software / configurations for CVE-2018-8834

Vendor Product Version Raw CPE
omron cx-flnet <= 1.00 cpe:2.3:a:omron:cx-flnet:*:*:*:*:*:*:*:*
omron cx-one <= 4.42 cpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:*
omron cx-programmer <= 9.65 cpe:2.3:a:omron:cx-programmer:*:*:*:*:*:*:*:*
omron cx-protocol <= 1.992 cpe:2.3:a:omron:cx-protocol:*:*:*:*:*:*:*:*
omron cx-server <= 5.0.22 cpe:2.3:a:omron:cx-server:*:*:*:*:*:*:*:*
omron network_configurator <= 3.63 cpe:2.3:a:omron:network_configurator:*:*:*:*:*:*:*:*
omron switch_box_utility <= 1.68 cpe:2.3:a:omron:switch_box_utility:*:*:*:*:*:*:*:*

References for CVE-2018-8834

URL Tags
https://ics-cert.us-cert.gov/advisories/ICSA-18-100-02 Third Party Advisory US Government Resource
cvelogic Threat Intelligence