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Vulnerability record · CVE-2020-27257 · published 9 February 2021

CVE-2020-27257: Omron cx-one type confusion vulnerability

OOmron · Cx One

This vulnerability allows local attackers to execute arbitrary code due to the lack of proper validation of user-supplied data, which can result in a type-confusion condition in the Omron CX-One Version 4.60 and prior devices.

7.8 CVSS 3.1 High EPSS 1.8% · top 22.6% CWE-843 · Type confusion
7.8CVSS 3.1 base score, v2 6.8
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

This vulnerability allows local attackers to execute arbitrary code due to the lack of proper validation of user-supplied data, which can result in a type-confusion condition in the Omron CX-One Version 4.60 and prior devices.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://us-cert.cisa.gov/ics/advisories/icsa-21-007-02 Third Party AdvisoryUS Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-21-184/ Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-007-02 Third Party AdvisoryUS Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-21-184/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2020-27259Omron cx-one vulnerabilityThe Omron CX-One Version 4.60 and prior may allow an attacker to supply a pointer to arbitrary memory locations, which may allow an attacker to remot…EPSS 2.7%8.8CVE-2020-27261Omron cx-one stack-based buffer overflow vulnerabilityThe Omron CX-One Version 4.60 and prior is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary cod…EPSS 7.6%7.8CVE-2022-25959Omron cx-position memory buffer overflow vulnerabilityOmron CX-Position (versions 2.5.3 and prior) is vulnerable to memory corruption while processing a specific project file, which may allow an attacker…EPSS 1.5%7.8CVE-2022-26022Omron cx-position out-of-bounds write vulnerabilityOmron CX-Position (versions 2.5.3 and prior) is vulnerable to an out-of-bounds write while processing a specific project file, which may allow an att…EPSS 1.5%7.8CVE-2022-26417Omron cx-position use after free vulnerabilityOmron CX-Position (versions 2.5.3 and prior) is vulnerable to a use after free memory condition while processing a specific project file, which may a…EPSS 1.5%7.8CVE-2022-26419Omron cx-position stack-based buffer overflow vulnerabilityOmron CX-Position (versions 2.5.3 and prior) is vulnerable to multiple stack-based buffer overflow conditions while parsing a specific project file, …EPSS 2.1%7.8CVE-2022-21137Omron cx-one stack-based buffer overflow vulnerabilityOmron CX-One Versions 4.60 and prior are vulnerable to a stack-based buffer overflow while processing specific project files, which may allow an atta…EPSS 9.3%7.8CVE-2021-27413Omron cx-one stack-based buffer overflow vulnerabilityOmron CX-One Versions 4.60 and prior, including CX-Server Versions 5.0.29.0 and prior, are vulnerable to a stack-based buffer overflow, which may all…EPSS 10.0%

Source: NIST National Vulnerability Database (record CVE-2020-27257), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.