Improper input validation in Modicon M218 Logic Controller
Priority LOW 35CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A CWE-20: Improper Input Validation vulnerability exists that could cause a Denial of Service when a crafted packet is sent to the controller over network port 1105/TCP. Affected Product: Modicon M218 Logic Controller (V5.1.0.6 and prior)
Why it matters now
EPSS 0.01004 63rd 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 |
|---|---|---|---|---|---|
| — | Modicon M218 Logic Controller (V5.1.0.6 and prior) | Modicon M218 Logic Controller (V5.1.0.6 and prior) | — | No fix listed | CNA |
- Modicon M218 Logic Controller (V5.1.0.6 and prior) Vendor— Affected Modicon M218 Logic Controller (V5.1.0.6 and prior) Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_m218_firmware:*:*:*:*:*:*:*:* | up to 5.1.0.6 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m218:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_m218_firmware:*:*:*:*:*:*:*:* Versions up to 5.1.0.6 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m218:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-22800
- 2026-10-03 Alias added: GHSA-v2xg-g3g4-3w34
More Schneider Electric Modicon M218 Firmware vulnerabilities
- 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-2020-06047 Out-of-bounds write in Modicon M218 Logic Controller V5.0.0.7 and prior CVSS 3.1HIGH 7.5
- TI-2020-06025 Out-of-bounds write in Modicon M218 Logic Controller CVSS 3.1HIGH 7.5
Sources
- CVE-2021-22800 · CVE Program
- CVE-2021-22800 · NVD
- FIRST EPSS
- GHSA-v2xg-g3g4-3w34 · 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