Rust advisories / microsoftsystem64
VulnerabilityRUSTSEC-2026-0102 · microsoftsystem64
RUSTSEC-2026-0102: `microsoftsystem64` was removed from crates.io for malicious code
Short answerA security vulnerability in the microsoftsystem64 crate: `microsoftsystem64` was removed from crates.io for malicious code. No severity score was published. No fixed version: replace the crate or remove the affected code path.
| Crate | microsoftsystem64 |
|---|---|
| Type | Vulnerability (malicious) |
| Affected versions | Every version. |
| Fixed in | none |
| Severity | not scored |
| Published | 2026-04-13 |
| Last changed | 2026-04-15 |
| Also known as | none |
What to do
- Find who pulls it in:
cargo tree -i microsoftsystem64. - Avoid the affected API, or replace the crate.
Details from the advisory
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!
References
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
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