Local Buffer Overflow Vulnerability in dataSIMS Avionics ARINC 664-1 by DDC
CVE-2021-47881

6.7MEDIUM

Key Information:

Vendor

Data Device Corporation

Status
Datasims Avionics Arinc
Vendor
CVE Published:
23 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47881?

The dataSIMS Avionics ARINC 664-1 version 4.5.3 includes a vulnerability that could be exploited through a local buffer overflow. By manipulating the milstd1553result.txt file, attackers may craft a malicious file with specific payload and alignment sections, enabling them to overwrite memory and potentially execute arbitrary code on the affected Windows system. This vulnerability poses a significant threat to data integrity and system security.

Affected Version(s)

dataSIMS Avionics ARINC 4.5.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47881 - Proof of Concept

References

https://www.exploit-db.com/exploits/49577
exploit
https://www.ddc-web.com/
product
https://www.ddc-web.com/en/connectivity/databus/milstd155...
product

CVSS V4

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kağan Çapar
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