CVE-2021-46153

Code execution via unvalidated NEU parser writes

Published Feb 9, 2022 · Updated Aug 4, 2024

Memory corruption in Siemens Simcenter Femap 2020.2 and 2021.1 allows remote attackers to execute code via crafted NEU files. The NEU parser fails to validate user-supplied data before writing beyond an allocated data structure, corrupting process memory. Exploitation requires a target to open the malicious file or visit attacker-controlled content, and resulting code runs with the current process's privileges.

CVSS severity7.8
High
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Siemens Simcenter Femap 2020.2 and 2021.1 allows remote attackers to execute code via crafted NEU files. The NEU parser fails to validate user-supplied data before writing beyond an allocated data structure, corrupting process memory. Exploitation requires a target to open the malicious file or visit attacker-controlled content, and resulting code runs with the current process's privileges.

The record

CVE
CVE-2021-46153
Published
Feb 9, 2022
Updated
Aug 4, 2024
Vendor
Siemens
Product
Simcenter Femap
Classifications
CWE-119, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=All versions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · Simcenter Femapversion=All versions

Published CVSS scores

7.8Trend Micro Zero Day InitiativeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1204.002User Execution: Malicious 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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