What’s Vulnerable › Vulnerabilities

CVE-2021-47881: dataSIMS Avionics ARINC 664-1 - Local Buffer Overflow

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-23 · updated 2026-06-17
• Weakness: CWE-121

Description

dataSIMS Avionics ARINC 664-1 version 4.5.3 contains a local buffer overflow vulnerability that allows attackers to overwrite memory by manipulating the milstd1553result.txt file. Attackers can craft a malicious file with carefully constructed payload and alignment sections to potentially execute arbitrary code on the Windows system.

Affected products

• Data Device Corporation dataSIMS Avionics ARINC: 4.5.3

References

• https://www.ddc-web.com/
• https://www.ddc-web.com/en/connectivity/databus/milstd1553-1/software-1/bu-69414?partNumber=BU-69414
• https://www.exploit-db.com/exploits/49577
• https://www.vulncheck.com/advisories/datasims-avionics-arinc-local-buffer-overflow

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