CVE-2026-23720

Arbitrary code execution via NDB out-of-bounds read

Published Feb 10, 2026 · Updated Feb 10, 2026

Out-of-bounds read in Siemens Simcenter Femap and Nastran before V2512 allows attackers to execute code through a crafted NDB file. The applications read beyond an NDB buffer boundary during parsing; Siemens has not disclosed the affected parser routine or exact malformed field. Exploitation requires a user to open an untrusted NDB file, after which code runs with the current process's privileges; a crash is also possible.

CVSS severity7.3
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Siemens Simcenter Femap and Nastran before V2512 allows attackers to execute code through a crafted NDB file. The applications read beyond an NDB buffer boundary during parsing; Siemens has not disclosed the affected parser routine or exact malformed field. Exploitation requires a user to open an untrusted NDB file, after which code runs with the current process's privileges; a crash is also possible.

The record

CVE
CVE-2026-23720
Published
Feb 10, 2026
Updated
Feb 10, 2026
Vendor
Siemens
Product
Simcenter Nastran
Classifications
CWE-125, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V2512

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · Simcenter Nastranversion=0 <V2512
Siemens · Simcenter Femapversion=0 <V2512

Published CVSS scores

7.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.8Siemens AGCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.3Siemens AGCVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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