Memory corruption in Modicon M258 Firmware and SoMachine/SoMachine Motion software
Priority LOW 32CWE-119Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- High
- User interaction
- None
- 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-119 and the CVSS impact.
Summary
A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists in Modicon M258 Firmware (All versions prior to V5.0.4.11) and SoMachine/SoMachine Motion software (All versions), that could cause a buffer overflow when the length of a file transferred to the webserver is not verified.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01084 65th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Modicon M258 Firmware (All versions prior to V5.0.4.11) and SoMachine/SoMachine Motion software (All versions) | Modicon M258 Firmware (All versions prior to V5.0.4.11) and SoMachine/SoMachine Motion software (All versions) | — | No fix listed | CNA |
- Modicon M258 Firmware (All versions prior to V5.0.4.11) and SoMachine/SoMachine Motion software (All versions) Vendor— Affected Modicon M258 Firmware (All versions prior to V5.0.4.11) and SoMachine/SoMachine Motion software (All versions) Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_m258_firmware:*:*:*:*:*:*:*:* | before 5.0.4.11 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m258:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:a:schneider-electric:somachine:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:a:schneider-electric:somachine_motion:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_m258_firmware:*:*:*:*:*:*:*:* Versions before 5.0.4.11 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m258:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:a:schneider-electric:somachine:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:a:schneider-electric:somachine_motion:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-28220
- 2026-10-03 Alias added: GHSA-xfpf-x83h-3xxj
References
More Schneider Electric Modicon M258 Firmware vulnerabilities
- TI-2019-04853 Missing authentication in Modicon and PacDrive Controller, All versions of: Modicon M100… CVSS 3.1HIGH 8.2
- TI-2020-06010 Insufficient verification of data authenticity in EcoStruxure Machine Expert SoMachine… CVSS 3.1CRITICAL 9.8
- TI-2020-06011 Cleartext transmission of sensitive information in EcoStruxure Machine Expert SoMachine… CVSS 3.1HIGH 7.5
- TI-2024-06054 Cross-site scripting in Schneider Electric Modicon Controllers M241 / M251 CVSS 3.1MEDIUM 6.1
- TI-2025-12704 Cross-site scripting in Schneider Electric Modicon Controllers M241/M251 CVSS 4.0MEDIUM 5.1
Sources
- CVE-2020-28220 · CVE Program
- CVE-2020-28220 · NVD
- FIRST EPSS
- GHSA-xfpf-x83h-3xxj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences