RCE in Bixat Rustfly
CVE-2026-27476
RustFly 2.0.0 contains a command injection vulnerability in its remote UI control mechanism that accepts hex-encoded instructions over UDP port 5005 without proper sanitization. Attackers can send crafted hex-encoded payloads containing system commands to execute arbitrary operations on the target system, including reverse shell establishment and command execution.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (86.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.030 · change: +0.003
Affected products
- Bixat Rustfly — versions 2.0.0
Weakness classification (CWE)
References
- packetstorm.news/files/id/215819/ (exploit)
- www.vulncheck.com/advisories/rustfly-command-injection-via-udp-remote-control (third-party-advisory)
Frequently asked questions
- What is CVE-2026-27476?
- CVE-2026-27476 is a critical-severity vulnerability in Bixat Rustfly, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-02-19.
- How severe is CVE-2026-27476?
- Critical severity. CVSS v3 base score is 9.8 out of 10.