RUSTSEC-2026-0102 `microsoftsystem64` was removed from crates.io for malicious code
A malicious Rust crate exfiltrates sensitive files and credentials, requiring developers to remove it immediately.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is RUSTSEC-2026-0102?
RUSTSEC-2026-0102 is a vulnerability in microsoftsystem64, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
microsoftsystem64 installs a hardcoded SSH authorized_keys entry (persistence/backdoor) and scans for sensitive files (.env, credential-like JSON names, keyword-matching docs), reads their contents, base64-encodes where needed, and exfiltrates everything to a remote server via HTTP. It also packages and uploads Telegram Desktop tdata, indicating targeted credential/session/data harvesting.
The malicious crate had 9 versions published on 2026-04-09 that had a total of 6346 downloads. There were no crates depending on this crate on crates.io.
Thanks to Socket.dev and sitsh for detecting and reporting this to the crates.io team!
Which versions are affected by RUSTSEC-2026-0102?
1 open source package ship an affected version, including microsoftsystem64.
| Package | Affected | Fixed in |
|---|---|---|
microsoftsystem64 crates.io | From 0.0.0-0 | None |
How do I fix RUSTSEC-2026-0102?
No fix has been published for RUSTSEC-2026-0102 yet. Limit exposure of the affected software until one is available.
Is RUSTSEC-2026-0102 being exploited?
There is no known exploitation of RUSTSEC-2026-0102 in the wild and no public exploit code.