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No exploitation reportedFix available

CVE-2018-11451

No exploitation reported by the sources we read.

  • Published2018-07-23
  • Fixed in7.80
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.33), Firmware variant PROFINET IO for EN100 Ethernet module (All versions), 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 < V1.22), SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules (All versions < V7.80), 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.

Timeline

dates in UTC
  1. 2018-07-2321:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-11451?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-11451?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Siemens cp100 firmwareversion to verify
BranchAffectedFixed in
7.80< 7.807.80
Siemens cp200 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Siemens cp300 firmwareversion to verify
BranchAffectedFixed in
7.80< 7.807.80

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-19-038-02 CISA1 known affected

    ICSA-19-038-02 Siemens EN100 Ethernet Module

    Firmware variant IEC 61850 for EN100 Ethernet module

  • ICSA-18-347-02 CISA7 known affected

    ICSA-18-347-02 Siemens EN100 Ethernet Communication Module and SIPROTEC 5 Relays (Update A)

    Firmware variant IEC 61850 for EN100 Ethernet module · Firmware variant PROFINET IO for EN100 Ethernet module · Firmware variant Modbus TCP for EN100 Ethernet module · +4 more

Full record on NVD

Fix

  1. Update Siemens cp100 firmware to 7.80
  2. Vendor fix CISA ICSA-19-038-02 · 1 productUpdate to V4.33. Applying the update causes the module to go through a single restart cycle. - Download: https://support.industry.siemens.com/cs/us/en/view/109745821
  3. Vendor fix CISA ICSA-18-347-02 · 1 productUpdate to V4.33 - Download: https://support.industry.siemens.com/cs/us/en/view/109745821 Applying the update causes the module to go through a single restart cycle.
  4. Vendor fix CISA ICSA-18-347-02 · 1 productUpdate to V1.22 - Download: https://support.industry.siemens.com/cs/us/en/view/109745821 Applying the update causes the module to go through a single restart cycle.
  5. Vendor fix CISA ICSA-18-347-02 · 1 productUpdate to firmware version V7.80 for the following device types: 6MD85, 6MD86, 7SS85, 7KE85, 7UM85, 7SA87, 7SD87, 7SL87, 7VK87, 7SA82, 7SA86, 7SD82, 7SD86, 7SL82, 7SL86, 7SJ86, 7SK82, 7SK85, 7SJ82, 7SJ85, 7UT82, 7UT85, 7UT86, and 7UT87. - Download: Search for "SIPROTEC 5 <Device type> - DIGSI Devic…
  6. Vendor fix CISA ICSA-18-347-02 · 1 productUpdate to firmware version V7.58 for the following device types: 6MD85, 6MD86, 7SS85, 7KE85, 7UM85, 7SA87, 7SD87, 7SL87, 7VK87, 7SA82, 7SA86, 7SD82, 7SD86, 7SL82, 7SL86, 7SJ86, 7SK82, 7SK85, 7SJ82, 7SJ85, 7UT82, 7UT85, 7UT86, and 7UT87. - Download: Search for “SIPROTEC 5 <Device type> - DIGSI Devic…
  7. Mitigation from the vendor CISA ICSA-19-038-02 · 1 productSiemens has identified the following specific workarounds and mitigations thatcustomers can apply to reduce the risk: Block access to port 102/TCP e.g. with an external firewall.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.07.8read 2026-10-23
  • NVDweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score2.4 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2018-07-23
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-11451?

A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.33), Firmware variant PROFINET IO for EN100 Ethernet module (All versions), 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 < V1.22), SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules (All versions < V7.80), 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.

Is CVE-2018-11451 actively exploited?

Active exploitation of CVE-2018-11451 has not been confirmed. Its EPSS score was 2.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-11451?

CVE-2018-11451 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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