A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.35), Firmware variant MODBUS
A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.35), Firmware variant MODBUS TCP for EN100 Ethernet module (All versions), Firmware variant DNP3 TCP for EN100 Ethernet module (All versions), Firmware variant IEC104 for EN100 Ethernet module (All versions), Firmware variant Profinet IO for EN100 Ethernet module (All versions), SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules (All versions < V7.82), SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet communication modules (All versions < V7.58). Specially crafted packets to port 102/tcp could cause a denial-of-service condition in the affected products. A manual restart is required to recover the EN100 module functionality of the affected devices. Successful exploitation requires an attacker with network access to send multiple packets to the affected products or modules. As a precondition the IEC 61850-MMS communication needs to be activated on the affected products or modules. No user interaction or privileges are required to exploit the vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the network functionality of the device, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.
- Published
- Mar 21, 2019
- Updated
- Jun 16, 2026
- EPSS
- 1.2% · 66th percentile
- CWE
- —
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Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.2%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| siemens | siprotec 5 with cpu variant cp100 | cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp100 |
| siemens | siprotec 5 with cpu variant cp200 | cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp200 |
| siemens | siprotec 5 with cpu variant cp300 | cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp300 |
| siemens | 6md85 | cpe:2.3:h:siemens:6md85 |
| siemens | 6md86 | cpe:2.3:h:siemens:6md86 |
| siemens | 7ke85 | cpe:2.3:h:siemens:7ke85 |
| siemens | 7sa82 | cpe:2.3:h:siemens:7sa82 |
| siemens | 7sa86 | cpe:2.3:h:siemens:7sa86 |
| siemens | 7sa87 | cpe:2.3:h:siemens:7sa87 |
| siemens | 7sd82 | cpe:2.3:h:siemens:7sd82 |
| siemens | 7sd86 | cpe:2.3:h:siemens:7sd86 |
| siemens | 7sd87 | cpe:2.3:h:siemens:7sd87 |
and 22 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- siemens en100 ethernet module firmwareall versions
- siemens en100 ethernet module with firmware variant dnp3 tcpall versions
- siemens en100 ethernet module with firmware variant iec 618504.35
- siemens en100 ethernet module with firmware variant iec104all versions
- siemens en100 ethernet module with firmware variant modbus tcpall versions
- siemens en100 ethernet module with firmware variant profinet ioall versions
- siemens siprotec 5 with cpu variant cp100before 7.82
- siemens siprotec 5 with cpu variant cp200before 7.58
- siemens siprotec 5 with cpu variant cp300before 7.82
Versions reported by the vendor
Affected version ranges reported by the assigning authority (siemens). Independent of NVD's CPE analysis and usually ahead of it.
Siemens Firmware variant DNP3 TCP for EN100 Ethernet module
- All versionsaffected
Siemens Firmware variant IEC 61850 for EN100 Ethernet module
- All versions < V4.35affected
Siemens Firmware variant IEC104 for EN100 Ethernet module
- All versionsaffected
Siemens Firmware variant MODBUS TCP for EN100 Ethernet module
- All versionsaffected
Siemens Firmware variant Profinet IO for EN100 Ethernet module
- All versionsaffected
Siemens SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet communication modules
- All versions < V7.58affected
Siemens SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules
- All versions < V7.82affected
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.