Steppschuh Remote Control Server 3.1.1.12 Unauthenticated RCE

published 2025-07-23 15 mo ago modified 2026-07-28 3 mo ago also EUVD-2022-55210

cvss: 9.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits: 1; Metasploit

Remote Control Server, maintained by Steppschuh, 3.1.1.12 allows unauthenticated remote code execution when authentication is disabled, which is the default configuration. The server exposes a custom UDP-based control protocol that accepts remote keyboard input events without verification. An attacker on the same network can issue a sequence of keystroke commands to launch a system shell and execute arbitrary commands, resulting in full system compromise.

Timeline

2022-09-20 First public exploit (Metasploit exploit/windows/misc/remote_control_collection_rce)
2025-07-23 Published

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 15 mo ago (2025-07-23)

Exploit prediction

2.51% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/windows/misc/remote_control_collection_rce Remote Control Collection RCE metasploit exploit, normal rank, 2022-09-20
raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/remote_control_collection_rce.rb referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Steppschuh Remote Control Collection Server

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality
CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

raw.githubusercontent.com /rapid7/metasploit-framework/master/modules/exploits/windows/misc/remote_control_collection_rce.rb
exploit
remote-control-collection.com /
product
vulncheck.com /advisories/steppschuh-remote-control-server-unauth-rce
third-party-advisory

Sources

CVE List CVE-2022-4978
NVD CVE-2022-4978

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary