CVE-2020-27261

mediumpriority · track · 38EPSS 0.076 · 95 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

7.61% (95th) EPSS

CVSS 6.8 · medium

Is it mine?

21 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

The 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 code.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCX-Positioncisa_csaf_ot
Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service and are as follows: CX-Position Version 2.53
FixedCX-Protocolcisa_csaf_ot
Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service and are as follows: CX-Position Version 2.53
FixedCX-Servercisa_csaf_ot
Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service and are as follows: CX-Position Version 2.53
MitigationCX-Positioncisa_csaf_ot
Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service and are as follows: CX-Protocol: Version 2.03
MitigationCX-Protocolcisa_csaf_ot
Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service and are as follows: CX-Protocol: Version 2.03
MitigationCX-Servercisa_csaf_ot
Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service and are as follows: CX-Protocol: Version 2.03

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.07.8highCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · CISA US

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-121USCWE-121USCWE-121US

affected products (21)

Products and version ranges known to be affected.

CX-Position: Versions 2.52 and priorall versionscisa_csaf_otUS
CX-Protocol: Versions 2.02 and priorall versionscisa_csaf_otUS
CX-Server: Versions 5.0.28 and priorall versionscisa_csaf_otUS
Omron CX-Position≤ 2.52cisa_csaf_otUS
Omron CX-Protocol≤ 2.02cisa_csaf_otUS
Omron CX-Server≤ 5.0.28cisa_csaf_otUS
Omron CX-One≤ unspecified ≤4.60enisa_euvdEU
Omron CX-Position≤ unspecified ≤2.52enisa_euvdEU
Omron CX-Protocol≤ unspecified ≤2.02enisa_euvdEU
Omron CX-Server≤ unspecified ≤5.0.28enisa_euvdEU
Omron Electronics LLC CX-One≤ 4.42fstec_bduRU
Omron Electronics LLC CX-One≤ 4.6fstec_bduRU
Omron Electronics LLC CX-One≤ 4.41fstec_bduRU
Omron Electronics LLC CX-One≤ 4.40fstec_bduRU
Omron Electronics LLC Omron CX-Position≤ 2.53fstec_bduRU
Omron Electronics LLC Omron CX-Protocol≤ 2.03fstec_bduRU
Omron Electronics LLC Omron CX-Server≤ 5.0.29fstec_bduRU
omron cx-one≤ 4.60nvdUScpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:*
omron cx-position≤ 2.52nvdUScpe:2.3:a:omron:cx-position:*:*:*:*:*:*:*:*
omron cx-protocol≤ 2.02nvdUScpe:2.3:a:omron:cx-protocol:*:*:*:*:*:*:*:*

showing 20 of 21

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-007-02Omron CX-One2021-01-07icsa · cisa_csaf_otUS
Worldwide

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2021-02-09modified 2026-06-17

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+16123 more

references (11)

External citations — patches, advisories, analysis.

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