CVE-2018-20026

Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.

Published: 2019-02-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-20026 is rated Moderate Risk (62.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.04%). EPSS rose +2.12% over the last day, indicating growing attacker interest. 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-2018-20026

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 2026-06-15 0.92% 3.04% +2.12%
2 2026-03-09 1.05% 0.92% -0.14%
3 2026-02-18 — 1.05% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-20026

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
No account or special rights needed—anonymous or random user is enough.
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:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
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:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-20026

Affected software / configurations for CVE-2018-20026

Vendor Product Version Raw CPE
codesys control_for_beaglebone_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_beaglebone_sl:*:*:*:*:*:*:*:*
codesys control_for_empc-a\/imx6_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_empc-a\/imx6_sl:*:*:*:*:*:*:*:*
codesys control_for_iot2000_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_iot2000_sl:*:*:*:*:*:*:*:*
codesys control_for_linux_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_linux_sl:*:*:*:*:*:*:*:*
codesys control_for_pfc100_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_pfc100_sl:*:*:*:*:*:*:*:*
codesys control_for_pfc200_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_pfc200_sl:*:*:*:*:*:*:*:*
codesys control_for_raspberry_pi_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_for_raspberry_pi_sl:*:*:*:*:*:*:*:*
codesys control_rte_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_rte_sl:*:*:*:*:*:*:*:*
codesys control_rte_sl_\(for_beckhoff_cx\) >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_rte_sl_\(for_beckhoff_cx\):*:*:*:*:*:*:*:*
codesys control_runtime_toolkit >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_runtime_toolkit:*:*:*:*:*:*:*:*
codesys control_win_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:control_win_sl:*:*:*:*:*:*:*:*
codesys development_system_v3 >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:development_system_v3:*:*:*:*:*:*:*:*
codesys gateway >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:gateway:*:*:*:*:*:*:*:*
codesys hmi_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:hmi_sl:*:*:*:*:*:*:*:*
codesys opc_server >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:opc_server:*:*:*:*:*:*:*:*
codesys plchandler >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:plchandler:*:*:*:*:*:*:*:*
codesys safety_sil2 >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:safety_sil2:*:*:*:*:*:*:*:*
codesys targetvisu_sl >= 3.0, < 3.5.14.0 cpe:2.3:a:codesys:targetvisu_sl:*:*:*:*:*:*:*:*

References for CVE-2018-20026

cvelogic Threat Intelligence