High 8.4Published Jan 23, 2026

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

Updated under an hour ago (Oct 29, 2026, 3:30 AM ET)

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Every CVE for Data Device Corporation dataSIMS Avionics ARINC

Exploited in the last 30 days

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.

CVSS: 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jan 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Data Device Corporation dataSIMS Avionics ARINC data_device:datasims_avionics_arinc (from the name)	4.5.3	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.