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Vulnerability Assessment

Weakness
CWE
CWE-400
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK

1 technique across 1 tactic: Impact

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 8.7 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 5.26%.
Exploit ScenarioDerived

A remote attacker could cause denial of service by exhausting system resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 5.3% exploitation probability (EPSS)

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AnalysisAI

Specially crafted packets sent to port 161/udp could cause a denial of service condition. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.

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Technical ContextAI · show details

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. Specially crafted packets sent to port 161/udp could cause a denial of service condition. The affected devices must be restarted manually. Affected products include: Siemens Simatic S7-200 Firmware, Siemens Simatic S7-400Pn V6 Firmware, Siemens Simatic S7-400H V6 Firmware, Siemens Simatic S7-400Pn\/Dp V7 Firmware, Siemens Simatic S7-410 V8 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
None
Vulnerable system: Availability
High
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

Specially crafted packets sent to port 161/udp could cause a denial of service condition. The affected devices must be restarted manually.

Threat Intelligence Overview

EPSS Score
5.3%
Top 10% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 5.3%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +5
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:siemens:simatic_s7-200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-400pn_v6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-400h_v6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-400pn\/dp_v7_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-410_v8_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-300_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-1200_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-1500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-1500_controller_firmware:2.0:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_winac_rtx_f_2010_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200al_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200ecopn_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200m_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200mp_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200pro_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_et_200sp_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:dk_standard_ethernet_controller_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ek-ertec_200p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ek-ertec_200pn_io_firmware:-:*:*:*:*:*:*:*
+ 18 more

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Same weakness CWE-400 – Uncontrolled Resource Consumption

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Same technique Denial Of Service

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References

Advisories & patches
REF https://cert-portal.siemens.com/productcert/html/ssa-141614.html REF https://cert-portal.siemens.com/productcert/html/ssa-346262.html REF https://cert-portal.siemens.com/productcert/html/ssa-546832.html REF https://cert-portal.siemens.com/productcert/pdf/ssa-141614.pdf REF https://cert-portal.siemens.com/productcert/pdf/ssa-346262.pdf REF https://cert-portal.siemens.com/productcert/pdf/ssa-546832.pdf REF https://www.securityfocus.com/bid/101964

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