Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for ~1 minute by sending a specially crafted HTTP request
Published Nov 30, 2018
7.5
HIGHCVSS 3.0
EPSS 2.42%
Description
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for ~1 minute by sending a specially crafted HTTP request.
Affected products
- Vendor Schneider Electric SE Product Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 Defaultn/a
- Version Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200StatusaffectedConstraints-
- 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 | Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 | n/a |
|
Configuration 1
- n/a
Running on/with
- n/a
Configuration 2
Running on/with
- n/a
Configuration 3
Running on/with
- n/a
Configuration 4
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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
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 (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.42% (0.02423) | 83.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.42% (0.02423) | 81.99th | v5 (v2026.06.15) |
| Nov 21, 2025 | 2.67% (0.02668) | 85.29th | v4 (v2025.03.14) |
| Nov 18, 2025 | 4.76% (0.04756) | 88.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.16% (0.03160) | 86.06th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.37% (0.00366) | 72.69th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.37% (0.00366) | 71.65th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.37% (0.00366) | 68.07th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00826) | 22.22th | v1 |
| Jan 6, 2022 | 0.83% (0.00826) | 21.62th | v1 |
| Sep 1, 2021 | 0.83% (0.00826) | 52.18th | v1 |
| Apr 14, 2021 | 0.83% (0.00826) | 0.00th | v1 |
References (2)
- https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/ x_refsource_CONFIRMVendor Advisory
- https://www.tenable.com/security/research/tra-2018-38 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/ | x_refsource_CONFIRMVendor Advisory | |
| https://www.tenable.com/security/research/tra-2018-38 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.