CVE-2021-27413

mediumpriority · track · 34EPSS 0.100 · 96 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

9.99% (96th) EPSS

CVSS 6.8 · medium

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

Omron 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 allow an attacker to execute arbitrary code.

remediations

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

A vendor fix is available.

FixedCX-Onecisa_csaf_ot
WAGO released a security patch with FW11 available. Omron has released an updated version of CX-One to address the reported vulnerability.
FixedCX-Servercisa_csaf_ot
WAGO released a security patch with FW11 available. Omron has released an updated version of CX-One to address the reported vulnerability.
MitigationCX-Onecisa_csaf_ot
CX-Server: Version 5.0.29.1
MitigationCX-Servercisa_csaf_ot
CX-Server: Version 5.0.29.1

cvss

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

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.8

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

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · 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

v3.17.1highCVSS:3.1/AV:L/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-121US

affected products (7)

Products and version ranges known to be affected.

CX-One: Versions 4.60 and priorall versionscisa_csaf_otUS
CX-Server: Versions 5.0.29.0 and priorall versionscisa_csaf_otUS
Omron CX-One≤ 4.60cisa_csaf_otUS
Omron CX-Server≤ 5.0.29.0cisa_csaf_otUS
n/a Omron CX-One≤ CX-One Versions 4.60 and prior, including the following applications: CX-Server Versions 5.0.29.0 and priorenisa_euvdEU
omron cx-one≤ 4.60nvdUScpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:*
omron cx-server≤ 5.0.29nvdUScpe:2.3:a:omron:cx-server:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-131-01Omron CX-One2021-05-11icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability may allow arbitrary code execution.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2021-05-13modified 2026-06-17

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+16123 more

references (9)

External citations — patches, advisories, analysis.

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