What is the CVSS score of CVE-2026-23718?

CVE-2026-23718 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-23718?

Within 24 hours: Identify all systems running Simcenter Femap and Nastran versions prior to V2512 and document their business criticality. Within 7 days: Implement network controls to restrict NDB file transfers to trusted sources only and disable NDB file parsing if not essential to operations. Within 30 days: Monitor vendor communications closely for patch release and prepare a deployment plan; in the interim, restrict NDB file processing to air-gapped or isolated environments where possible.

Simcenter Femap CVE-2026-23718

Q: Which versions of Simcenter Femap are affected by CVE-2026-23718?

Simcenter Femap and Nastran users face a high-severity vulnerability (CVE-2026-23718) that could allow attackers to crash applications or potentially execute code by sending malicious NDB files.

HIGH

Out-of-bounds Read (CWE-125)

2026-02-10 productcert@siemens.com

Buffer Overflow Information Disclosure Siemens Simcenter Femap Simcenter Nastran

7.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft malicious NDB file
Delivery

Deliver to target user
Exploit

User opens file in Femap/Nastran
Execution

Parser reads out-of-bounds memory
Impact

Execute arbitrary code in process context

Vulnerability Assessment

Weakness	CWE CWE-125 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, read limits MITRE ATT&CK 1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	User must manually open a specially crafted NDB file in Simcenter Femap or Simcenter Nastran versions prior to V2512. Requires local file access and user interaction to trigger the out-of-bounds read during NDB parsing.
Impact	CVSS 7.8 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: Required.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to execute code in the context of the current process.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Out-of-bounds read in Simcenter Femap and Nastran versions prior to V2512 during NDB file parsing enables local code execution under the current process context. An attacker can exploit this vulnerability through specially crafted NDB files to achieve arbitrary code execution. No patch is currently available for this high-severity vulnerability affecting both products.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:02 CVSS 7.8

A vulnerability has been identified in Simcenter Femap (All versions < V2512), Simcenter Nastran (All versions < V2512). The affected applications contains an out of bounds read vulnerability while parsing specially crafted NDB files. [CVSS 7.8 HIGH]

RemediationAI

Monitor vendor advisories for a patch.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-125 (Out-of-bounds Read). Affects Simcenter Femap. A vulnerability has been identified in Simcenter Femap (All versions < V2512), Simcenter Nastran (All versions < V2512). The affected applications contains an out of bounds read vulnerability while parsing specially crafted NDB files. This could allow an attacker to execute code in the context of the current process.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.8 HIGH

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Executive ViewAI

Why It Matters

Simcenter Femap and Nastran users face a high-severity vulnerability (CVE-2026-23718) that could allow attackers to crash applications or potentially execute code by sending malicious NDB files. Organizations using these engineering simulation tools for product design and analysis should treat this as a priority until patching is available.

Business Impact: High

Compensating Controls

Restrict NDB file ingestion to trusted sources only via network segmentation and firewall rules. Disable automated NDB file parsing and require manual review before processing. Isolate affected systems on dedicated network segments. Implement strict access controls limiting who can submit NDB files for processing. Monitor for suspicious file transfers and application crashes. Consider temporary workarounds such as converting NDB files to alternative formats if supported. Establish incident response procedures for potential exploitation attempts.

Threat Intelligence Overview

EPSS Score

0.0%

Top 100% 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 0.0%

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

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.