CVE-2026-27476Public exploitNetwork attack vector

Unauthenticated command execution via UDP control events

Published Feb 19, 2026 · Updated Feb 19, 2026

Command injection in Bixat RustFly 2.0.0 allows remote attackers to execute arbitrary system commands through UDP port 5005. The remote UI handler accepts unauthenticated hex-encoded instructions and turns decoded text and key events into desktop input without restricting command-bearing sequences. Network access to the listener is sufficient; the published PoC opens a shell through simulated keystrokes and runs with the desktop user's privileges.

CVSS severity9.3
Critical
EPSS probability2.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Bixat RustFly 2.0.0 allows remote attackers to execute arbitrary system commands through UDP port 5005. The remote UI handler accepts unauthenticated hex-encoded instructions and turns decoded text and key events into desktop input without restricting command-bearing sequences. Network access to the listener is sufficient; the published PoC opens a shell through simulated keystrokes and runs with the desktop user's privileges.

The record

CVE
CVE-2026-27476
Published
Feb 19, 2026
Updated
Feb 19, 2026
Vendor
Bixat
Product
RustFly
Classifications
CWE-78, T1059.001, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bixat · RustFlyversion=2.0.0

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.001PowerShell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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