A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11
Published Jun 30, 2017
9.1
CRITICALCVSS 3.1
EPSS 31.82%
Description
A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The session numbers generated by the web application are lacking randomization and are shared between several users. This may allow a current session to be compromised.
Affected products
- Vendor n/a Product Schneider Electric Modicon PLCs Defaultn/a
- Version Schneider Electric Modicon PLCsStatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Schneider Electric Modicon PLCs | n/a |
|
Configuration 1
- ≤ 4.0.3.20
Running on/with
- n/a
Configuration 2
- ≤ 4.0.3.20
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:N
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 31.82% (0.31820) | 98.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 31.82% (0.31820) | 98.07th | v5 (v2026.06.15) |
| May 23, 2026 | 14.76% (0.14763) | 94.58th | v4 (v2025.03.14) |
| Mar 2, 2026 | 18.57% (0.18568) | 95.16th | v4 (v2025.03.14) |
| Apr 15, 2025 | 14.76% (0.14763) | 94.06th | v4 (v2025.03.14) |
| Mar 30, 2025 | 12.31% (0.12309) | 93.25th | v4 (v2025.03.14) |
| Mar 29, 2025 | 15.33% (0.15333) | 91.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 12.31% (0.12309) | 93.31th | v4 (v2025.03.14) |
| Jan 12, 2025 | 1.65% (0.01645) | 87.29th | v3 (v2023.03.01) |
| Dec 12, 2024 | 2.82% (0.02816) | 91.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.20% (0.02203) | 87.66th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.38% (0.08382) | 93.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.38% (0.08382) | 93.35th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.38% (0.08382) | 82.62th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.85% (0.03849) | 72.82th | v1 |
| Jan 6, 2022 | 3.85% (0.03849) | 72.58th | v1 |
| Sep 1, 2021 | 3.85% (0.03849) | 83.03th | v1 |
| Apr 14, 2021 | 3.85% (0.03849) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/97254 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02 x_refsource_MISCThird Party AdvisoryUS Government Resource
- https://www.exploit-db.com/exploits/45918/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/97254 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02 | x_refsource_MISCThird Party AdvisoryUS Government Resource | |
| https://www.exploit-db.com/exploits/45918/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.