A CWE-326: Inadequate Encryption Strength vulnerability exists in Modicon M221 (all…
Priority LOW 34CWE-326Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-326.
Summary
A CWE-326: Inadequate Encryption Strength vulnerability exists in Modicon M221 (all references, all versions) that could allow the attacker to break the encryption key when the attacker has captured the traffic between EcoStruxure Machine - Basic software and Modicon M221 controller.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00294 22nd 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
- Total
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 M221, all references, all versions | Modicon M221, all references, all versions | — | No fix listed | CNA |
- Modicon M221, all references, all versions Vendor— Affected Modicon M221, all references, all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_m221_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m221:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_m221_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m221:-:*:*:*:*:*:*:* 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-2020-7565
- 2026-10-03 Alias added: GHSA-93f9-wg2h-r6p5
References
More Schneider Electric Modicon M221 Firmware vulnerabilities
- TI-2018-05633 Improper access control in Schneider Electric Modicon M221, all references, all versions… CVSS 3.1CRITICAL 9.8
- TI-2018-05632 Authentication bypass by capture-replay in Schneider Electric Modicon M221, all… CVSS 3.1CRITICAL 9.8
- TI-2020-06012 Injection in SoMachine Basic EcoStruxure Machine Expert – Basic Modicon M100 Logic… CVSS 3.1CRITICAL 9.8
- TI-2020-17144 A CWE-760: Use of a One-Way Hash with a Predictable Salt vulnerability exists in Modicon… CVSS 3.1CRITICAL 9.8
- TI-2019-08172 Uncontrolled resource consumption in ABB 1SAP120600R0071 PM554-TP-ETH CVSS 3.1HIGH 7.5
- TI-2019-04853 Missing authentication in Modicon and PacDrive Controller, All versions of: Modicon M100… CVSS 3.1HIGH 8.2
Sources
- CVE-2020-7565 · CVE Program
- CVE-2020-7565 · NVD
- FIRST EPSS
- GHSA-93f9-wg2h-r6p5 · 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