How severe is CVE-2020-27257?

CVE-2020-27257 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-27257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27257?

CVE-2020-27257 primarily affects Omron Cx-one. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-27257?

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-2020-27257 published?

CVE-2020-27257 was published on 2021-02-09 and last updated on 2026-06-17.

CVE-2020-27257

CVE-2020-27257 is a high-severity vulnerability in Omron Cx-one with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-843.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-843
Affected product: Omron Cx-one
Published: 2021-02-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-27257?: 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.
How severe is CVE-2020-27257?: CVE-2020-27257 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-27257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27257?: CVE-2020-27257 primarily affects Omron Cx-one. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-27257?: 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-2020-27257 published?: CVE-2020-27257 was published on 2021-02-09 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:*
cpe:2.3:a:omron:cx-position:*:*:*:*:*:*:*:*
cpe:2.3:a:omron:cx-protocol:*:*:*:*:*:*:*:*
cpe:2.3:a:omron:cx-server:*:*:*:*:*:*:*:*

More vulnerabilities in Omron Cx-one

CVE-2020-27261 — High (CVSS 8.8): The Omron CX-One Version 4.60 and prior is vulnerable to a stack-based buffer overflow, which may allow an attacker to…
CVE-2020-27259 — High (CVSS 8.8): The Omron CX-One Version 4.60 and prior may allow an attacker to supply a pointer to arbitrary memory locations, which…
CVE-2022-21137 — High (CVSS 7.8): Omron CX-One Versions 4.60 and prior are vulnerable to a stack-based buffer overflow while processing specific project…
CVE-2021-27413 — High (CVSS 7.8): Omron CX-One Versions 4.60 and prior, including CX-Server Versions 5.0.29.0 and prior, are vulnerable to a stack-based…
CVE-2018-19027 — High (CVSS 7.8): Three type confusion vulnerabilities exist in CX-One Versions 4.50 and prior and CX-Protocol Versions 2.0 and prior…
CVE-2018-18993 — High (CVSS 7.8): Two stack-based buffer overflow vulnerabilities have been discovered in CX-One Versions 4.42 and prior (CX-Programmer…

All CVEs affecting Omron Cx-one →

Other CWE-843 vulnerabilities

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CVE-2010-2299 — Critical (CVSS 10.0): The Clipboard::DispatchObject function in app/clipboard/clipboard.cc in Google Chrome before 5.0.375.70 does not…
CVE-2023-22579 — Critical (CVSS 9.9): Due to improper parameter filtering in the sequalize js library, can a attacker peform injection.
CVE-2026-13776 — Critical (CVSS 9.8): Type Confusion in Dawn in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-43038 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ipv6: icmp: clear skb2->cb[] in…
CVE-2025-70023 — Critical (CVSS 9.8): An issue pertaining to CWE-843: Access of Resource Using Incompatible Type was discovered in transloadit uppy v0.25.6.

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