An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0)
Published Aug 29, 2018
9.8
CRITICALCVSS 3.1
EPSS 2.48%
Description
An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to replay authentication sequences. If an attacker exploits this vulnerability and connects to a Modicon M221, the attacker can upload the original program from the PLC.
Affected products
- Vendor Schneider Electric SE Product Modicon M221, all references, all versions prior to firmware V1.6.2.0 Defaultn/a
- Version Modicon M221, all references, all versions prior to firmware V1.6.2.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Schneider Electric SE | Modicon M221, all references, all versions prior to firmware V1.6.2.0 | n/a |
|
- < 1.6.2.0
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed May 29, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.48% (0.02478) | 83.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.48% (0.02478) | 82.43th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.22% (0.00220) | 60.41th | v3 (v2023.03.01) |
| Jan 20, 2024 | 0.22% (0.00220) | 59.97th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.27% (0.00270) | 62.66th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Oct 11, 2021 | 0.62% (0.00624) | 45.37th | v1 |
| Oct 10, 2021 | 2.74% (0.02742) | 80.22th | v5 (v2026.06.15) |
| Aug 20, 2021 | 2.74% (0.02742) | 0.00th | v1 |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- http://www.securityfocus.com/bid/105182 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/ x_refsource_CONFIRMMitigationVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105182 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/ | x_refsource_CONFIRMMitigationVendor Advisory |
Change history (0)
No recorded changes yet.