CVE-2021-47881 dataSIMS Avionics ARINC 664-1 - Local Buffer Overflow
Attackers can execute arbitrary code on Windows systems by tricking users into opening a maliciously crafted text file in dataSIMS Avionics software.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47881?
CVE-2021-47881 is a medium-severity memory corruption vulnerability in dataSIMS Avionics ARINC, published on 23 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2021-47881?
How do I fix CVE-2021-47881?
No fix has been published for CVE-2021-47881 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-47881 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47881 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-f869-2w7m-q4p9.