How severe is CVE-2018-20026?

CVE-2018-20026 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-20026 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20026?

CVE-2018-20026 primarily affects Codesys Control For Beaglebone Sl. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-20026?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-20026 published?

CVE-2018-20026 was published on 2019-02-19 and last updated on 2026-06-17.

CVE-2018-20026

CVE-2018-20026 is a high-severity vulnerability in Codesys Control For Beaglebone Sl with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Codesys Control For Beaglebone Sl
Published: 2019-02-19
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2018-20026?: Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.
How severe is CVE-2018-20026?: CVE-2018-20026 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-20026 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20026?: CVE-2018-20026 primarily affects Codesys Control For Beaglebone Sl. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-20026?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-20026 published?: CVE-2018-20026 was published on 2019-02-19 and last updated on 2026-06-17.

References

Affected products (18)

cpe:2.3:a:codesys:control_for_beaglebone_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_empc-a\/imx6_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_iot2000_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_linux_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_pfc100_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_pfc200_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_raspberry_pi_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_rte_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_rte_sl_\(for_beckhoff_cx\):*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_runtime_toolkit:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_win_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:development_system_v3:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:gateway:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:hmi_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:opc_server:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:plchandler:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:safety_sil2:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:targetvisu_sl:*:*:*:*:*:*:*:*

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