CVE-2011-1563

DATAC RealFlex RealWin <2.1 Build 6.1.10.10 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2011-1563. PoCs published by Luigi Auriemma, Luigi Auriemma, MC, including Metasploit module exploits/windows/scada/realwin_on_fcs_login.

AI-analyzed exploit summary This exploit demonstrates multiple remote stack overflow vulnerabilities in DATAC RealWin SCADA server (versions <= 2.1) via crafted packets sent to port 910. The PoC includes multiple payloads targeting different functions, each exploiting buffer overflows in username, filename, or path handling.

Description

Multiple stack-based buffer overflows in the HMI application in DATAC RealFlex RealWin 2.1 (Build 6.1.10.10) and earlier allow remote attackers to execute arbitrary code via (1) a long username in an On_FC_CONNECT_FCS_LOGIN packet, and crafted (2) On_FC_CTAGLIST_FCS_CADDTAG, (3) On_FC_CTAGLIST_FCS_CDELTAG, (4) On_FC_CTAGLIST_FCS_ADDTAGMS, (5) On_FC_RFUSER_FCS_LOGIN, (6) unspecified "On_FC_BINFILE_FCS_*FILE", (7) On_FC_CGETTAG_FCS_GETTELEMETRY, (8) On_FC_CGETTAG_FCS_GETCHANNELTELEMETRY, (9) On_FC_CGETTAG_FCS_SETTELEMETRY, (10) On_FC_CGETTAG_FCS_SETCHANNELTELEMETRY, and (11) On_FC_SCRIPT_FCS_STARTPROG packets to port 910.

Exploits (3)

exploitdb WORKING POC
by Luigi Auriemma · textdoswindows
https://www.exploit-db.com/exploits/17025

This exploit demonstrates multiple remote stack overflow vulnerabilities in DATAC RealWin SCADA server (versions <= 2.1) via crafted packets sent to port 910. The PoC includes multiple payloads targeting different functions, each exploiting buffer overflows in username, filename, or path handling.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: DATAC RealWin <= 2.1 (Build 6.1.10.10)
No auth needed
Prerequisites: Network access to target's port 910 · Vulnerable DATAC RealWin installation
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC GREAT
by Luigi Auriemma, MC · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/scada/realwin_on_fcs_login.rb

This Metasploit module exploits a stack buffer overflow in RealWin SCADA Server by sending a crafted On_FC_CONNECT_FCS_LOGIN packet with an overly long username, leading to arbitrary code execution via SEH overwrite.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: DATAC Control International RealWin SCADA Server 2.1 (Build 6.0.10.10) or earlier
No auth needed
Prerequisites: Network access to the target on port 910
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC GREAT
by Luigi Auriemma, MC · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/scada/realwin_on_fc_binfile_a.rb

This Metasploit module exploits a stack-based buffer overflow in DATAC RealWin SCADA Server 2.1 and below via a crafted On_FC_BINFILE_FCS_*FILE packet sent to port 910. The exploit leverages an SEH overwrite to achieve remote code execution.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: DATAC RealWin SCADA Server 2.1 and below
No auth needed
Prerequisites: Network access to port 910 on the target system
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (12)

Core 12
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/46937
Exploit x_refsource_misc
http://aluigi.org/adv/realwin_2-adv.txt
Exploit x_refsource_misc
http://aluigi.org/adv/realwin_7-adv.txt
Exploit exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/17025
Exploit x_refsource_misc
http://aluigi.org/adv/realwin_4-adv.txt
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/43848
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0742
Exploit x_refsource_misc
http://aluigi.org/adv/realwin_8-adv.txt
Exploit x_refsource_misc
http://aluigi.org/adv/realwin_5-adv.txt
Exploit x_refsource_misc
http://aluigi.org/adv/realwin_3-adv.txt
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/8176

Scores

EPSS 0.7464
EPSS Percentile 99.4%

Details

CWE
CWE-119
Status published
Products (3)
realflex/realwin 1.06
realflex/realwin 2.0
realflex/realwin < 2.1
Published Apr 05, 2011
Tracked Since Feb 18, 2026