CVE-2021-47881

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 v4.0

6.7 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

8.4 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.19% chance of exploitation in the next 30 days, 9th percentile

Published

2026-01-23

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/49577
• kagancapar/CVE-2021-47881

References

• CVE Record
• NVD entry

Related

• CVE-2022-29072
• CVE-2026-5201
• CVE-2026-54984
• CVE-2021-47880
• CVE-2021-47882
• CVE-2021-47879