Stack-based buffer overflow in OMRON Corporation CX-One
Priority MEDIUM 49CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.07937 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OMRON Corporation | CX-One | up to 4.60 | — | No fix listed | CNA |
| OMRON Corporation | CX-Protocol | up to 2.02 | — | No fix listed | CNA |
| OMRON Corporation | CX-Server | up to 5.0.28 | — | No fix listed | CNA |
| OMRON Corporation | CX-Position | up to 2.52 | — | No fix listed | CNA |
- CX-One VendorOMRON Corporation Affected up to 4.60 Fixed in — No fix listed CNA
- CX-Protocol VendorOMRON Corporation Affected up to 2.02 Fixed in — No fix listed CNA
- CX-Server VendorOMRON Corporation Affected up to 5.0.28 Fixed in — No fix listed CNA
- CX-Position VendorOMRON Corporation Affected up to 2.52 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:* | up to 4.60 | Vulnerable | OMRON Corporation |
| cpe:2.3:a:omron:cx-position:*:*:*:*:*:*:*:* | up to 2.52 | Vulnerable | OMRON Corporation |
| cpe:2.3:a:omron:cx-protocol:*:*:*:*:*:*:*:* | up to 2.02 | Vulnerable | OMRON Corporation |
| cpe:2.3:a:omron:cx-server:*:*:*:*:*:*:*:* | up to 5.0.28 | Vulnerable | OMRON Corporation |
- cpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:* Versions up to 4.60 Vulnerable ·OMRON Corporation
- cpe:2.3:a:omron:cx-position:*:*:*:*:*:*:*:* Versions up to 2.52 Vulnerable ·OMRON Corporation
- cpe:2.3:a:omron:cx-protocol:*:*:*:*:*:*:*:* Versions up to 2.02 Vulnerable ·OMRON Corporation
- cpe:2.3:a:omron:cx-server:*:*:*:*:*:*:*:* Versions up to 5.0.28 Vulnerable ·OMRON Corporation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27261
- 2026-10-03 Alias added: GHSA-5x49-f55r-f2xh
References
More OMRON Corporation Cx-one vulnerabilities
- TI-2022-05541 Stack-based buffer overflow in OMRON Corporation CX-One CVSS 3.1HIGH 7.8
- TI-2021-08904 Stack-based buffer overflow in Omron CX-One CVSS 3.1HIGH 7.8
- TI-2020-16585 The Omron CX-One Version 4.60 and prior may allow an attacker to supply a pointer to… CVSS 3.1HIGH 8.8
- TI-2020-16583 Type confusion in OMRON Corporation CX-One CVSS 3.1HIGH 7.8
- TI-2018-13457 Stack-based buffer overflow in CX-One CVSS 3.1HIGH 7.8
- TI-2018-13488 Type confusion in OMRON Corporation CX-Protocol within CX-One CVSS 3.0HIGH 7.8
Sources
- CVE-2020-27261 · CVE Program
- CVE-2020-27261 · NVD
- FIRST EPSS
- GHSA-5x49-f55r-f2xh · GitHub Advisory Database · CC BY 4.0
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