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CVE-2018-11466

A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUMERIK 808D V4.8 (All versions), SINUMERIK

A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUMERIK 808D V4.8 (All versions), SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3). Specially crafted network packets sent to port 102/tcp (ISO-TSAP) could allow a remote attacker to either cause a Denial-of-Service condition of the integrated software firewall or allow to execute code in the context of the software firewall. The security vulnerability could be exploited by an attacker with network access to the affected systems on port 102/tcp.

Successful exploitation requires no user privileges and no user interaction. The vulnerability could allow an attacker to compromise confidentiality, integrity and availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.

CRITICAL · CVSS 9.8 EPSS 0.0397
EPSS exploitation odds3.97% · top 10%
Schedule remediation
  • CVSS base score ≥ 7.0
No Sigma yet — build one → YARA rules0
Look this up elsewhere - one-click external pivots
NVDCVE.orgCISAExploit-DBGitHub PoCVulnCheck KEVGreyNoise
▸ How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2018-11466, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked. EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal. CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score. Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits. PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
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Exploitation momentum

1202 days of EPSS
dormant
Flat and low - no real exploitation pressure. This reads the direction and speed of EPSS over time, which can move before EPSS itself peaks or before CISA lists it.
Window
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Severity & exploitation scoring

View on NVD →
CVSS base score
9.8
CRITICALCVSS v3.0 · [email protected]
EPSS exploitation probability
3.97%
Top 10%odds of exploitation in the next 30 days
CVSS metric silhouette
VectorComplexityPrivilegesInteractionScopeConfidentialityIntegrityAvailability
shape grows toward worst-case
SSVC triage
No SSVC vulnrichment for this CVE. CISA's Vulnrichment program scores newer CVEs (~2024 onwards) plus selected older critical ones. Use the EPSS probability + KEV status to triage instead.
CVSS vector breakdown
Exploitability - how they get in
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Impact - what breaks
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
VECTORCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle
  1. 12 Dec 2018Published to NVD
  2. 17 Jun 2026Last modified
Every entry is a recorded date - NVD publish/modify, CISA KEV add, public exploit disclosure. No inferred events.
Attack path
Full kill chain
→
◆

ATT&CK techniques

1

Techniques this CVE enables. Pills with a solid outline are high confidence - named directly in ATT&CK or Nuclei, or human-curated by CTID; the rest are inferred from the weakness type using MITRE's CVE Mapping Methodology and the CWE → CAPEC chain. Broad, generic-weakness guesses are filtered out. A small N× marks a technique that N independent sources agree on.

T1190 · Exploit Public-Facing Application
▤ Build a SIEM detection for these techniques
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Weakness Classification

CWE-248Uncaught Exception
▤

Affected Products & Versions

5
siemens sinumerik 808d v4.7 firmwareall versions
siemens sinumerik 808d v4.8 firmwareall versions
siemens sinumerik 840d sl v4.7 firmware<= 4.7
siemens sinumerik 840d sl v4.8 firmware<= 4.8
siemens sinumerik 828d v4.7 firmware<= 4.7
▤

Related CVEs

8
CVEs linked to this one by a shared weakness (CWE) or affected product - joins on data already in the engine, with the reason shown per row.
CVE-2013-10065 A denial-of-service vulnerability exists in Sysax Multi-Server version 6.10 via... same CWE-248 HIGH CVE-2016-10363 Logstash versions prior to 2.3.3, when using the Netflow Codec plugin, a remote ... same CWE-248 HIGH CVE-2018-11464 A vulnerability has been identified in SINUMERIK 828D V4.7 (All versions < V4.7 ... same CWE-248 LOW CVE-2018-11465 A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUM... same CWE-248 HIGH CVE-2018-11459 A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUM... same product HIGH CVE-2018-11460 A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUM... same product HIGH CVE-2018-11461 A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUM... same product MEDIUM CVE-2018-11462 A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUM... same product CRITICAL
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Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2018-icsa-18-345-02
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/106185
Third Party AdvisoryVDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-170881.pdf
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