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CVE-2018-20026

25
FAUCET Score

CVE-2018-20026 describes an Improper Communication Address Filtering vulnerability affecting CODESYS V3 products prior to version V3.5.14.0. This high-severity vulnerability (CVSS 7.5) allows an unauthenticated attacker to remotely access sensitive information without user interaction. While no public exploits or Metasploit modules are available, the vulnerability has garnered minimal community discussion, with no evidence of active exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0, < 3.5.14.0CPE matchmatch criteria
cpe:2.3:a:codesys:control_for_beaglebone_sl:*:*:*:*:*:*:*:*
>= 3.0, < 3.5.14.0CPE matchmatch criteria
cpe:2.3:a:codesys:control_for_empc-a\/imx6_sl:*:*:*:*:*:*:*:*
>= 3.0, < 3.5.14.0CPE matchmatch criteria
cpe:2.3:a:codesys:control_for_iot2000_sl:*:*:*:*:*:*:*:*
>= 3.0, < 3.5.14.0CPE matchmatch criteria
cpe:2.3:a:codesys:control_for_linux_sl:*:*:*:*:*:*:*:*
>= 3.0, < 3.5.14.0CPE matchmatch criteria
cpe:2.3:a:codesys:control_for_pfc100_sl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.04%
Probability of exploitation in next 30 days
EPSS Percentile
86.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0304 is in the 75th percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ics-cert.kaspersky.com / advisories/klcert-advisories/2018/12/19/klcert-18-036-codesys-control-v3-improper-communication-address-filtering
MitigationThird Party Advisory
ics-cert.us-cert.gov / advisories/ICSA-18-352-04
Third Party AdvisoryUS Government Resource
securityfocus.com / bid/106251
Broken LinkThird Party AdvisoryVDB Entry